Empathy: The Core of Morality

1. Introduction

The term empathy comes from Edward Titchener's (1904) translation of the German word “Einfühlung” (Ganczarek et al., 2018). The concept of “Einfühlung” emerged in the late 19th/early 20th century in German philosophical aesthetics to refer to the act of an individual projecting himself onto another body or environment (including inanimate objects) to understand what is like to be in the outer space of the Self (Ganczarek et al., 2018). In the artistic world, considering that works of art are human artefacts and, therefore, translate thoughts, emotions and ideologies of humankind, there is a parallel between aesthetic and interpersonal empathy. Both present the fundamental role of the ability to take perspective, incorporate an alien situation and integrate the resulting affective effects. There is an important dimension of understanding, which, as Jaspers (2000) said, "is the way to access the mental states of others". We use what is subjectively available to us and spontaneously reinterpret it, realising what it is like to be in someone else's shoes. According to Jaspers (2000), this so-called "phenomenological observation" is not provided by the senses or by logical reasoning but comes from a direct and immediate understanding of what the other presents to us. Thus, we can affirm that considering its origin, empathy might be conceptually broader than it is commonly defined in several articles, where, often, it is limited to an exclusively emotional and interpersonal dimension (Churcher, 2016; Cuff et al., 2014; Isern-Mas and Gomila, 2019; Kauppinen, 2017; Pascal, 2017) or divided into several subtypes (Decety and Cowell, 2014; Decety, 2010; Decety and Cowell, 2014b; Schoeps et al., 2020; Simmons, 2013). This creates conceptual and methodological difficulties for an adequate clarification of its meaning and importance for general human behaviour and morality.

It is important to present our understanding of morality to clarify the relation we intend to approach and defend here. Derived from the Latin "moràlia", which means habits, customs or traditions, we will refer to morality as an expression of the judgments that classify decisions and the resulting behaviours as good/correct or bad/wrong (Ugazio et al., 2014). Normative and descriptive ethics seek to establish the best way to reach the most morally correct decision and untie the knot of several difficult-to-resolve dilemmas (Beauchamp and Childress, 2019). Here, we will not detail any theories that try to answer this herculean mission. Assuming that it is impossible on several occasions to attain a morally perfect response, that is, a decision deprived of any doubt or moral and existential anguish, we will propose that empathy, as we conceptualise it, is undoubtedly the core of morality.

The role of empathy in morality has been quite debated. The absence of a consensus (Coplan, 2011; Engelen and Röttger-Rössler, 2012; De Vignemont and Singer, 2006) on this relation has been due to several factors. First, the definition of empathy is disparate, which leads to different interpretations and conclusions about its importance for morality, in the distinction between good and evil or between the most and the least admissible when one faces ethical dilemmas. Second, the widespread understanding of empathy as an emotion or a predominantly emotional process alludes to subjectivity and the inability to determine what is morally acceptable. Third, the vagueness of its definition makes it difficult to accept that it is an exclusively human capacity. Fourth, the central role of empathy is often overshadowed by a dominant Kantian conception of morality as an absolute and objective value derived solely from Reason.

The complexity of humans' affective phenomena does not result from a brain area associated explicitly with emotions but from an intricate and harmonious relation of neuronal networks responsible for the most diverse emotional, behavioural, sensory, motor and cognitive functions (Sporns, 2013). Each person has a specific behavioural and emotional pattern resulting from the inter-influence between biology and the environment (Allen, 2015). These different patterns are part of the human affective spectrum, which can be more or less dynamic over time and whose intensity derives from the balance between Reason and Emotion.

Based on a literature analysis of the relationship between empathy and morality, we will present our conceptual model of empathy to justify its indispensability for moral judgments and decisions.

To simplify concepts, we will refer to emotions, feelings, and affects as Emotion or affective phenomena and to higher cognitive functions as Reason.

2. Objective

This scoping review aims to analyse the relationship between empathy and morality and propose a conceptual model of empathy to respond appropriately to the most diverse circumstances in which a moral decision is pending.

3. Methodology

A scoping review was performed based on the PRISMA guidelines (Liberati et al., 2009; Shamseer et al., 2015).

Table 1. Search strategy.

Date	Databases	Search strategy	Number of results
17th June 2023	APA PsycINFO	Search terms: empathy and morality Search options Expanders - Apply equivalent subjects Restrict by Subject: - empathy Restrict by Subject: - morality Search Modes - Boolean/Phrase	65
	SCOPUS	ALL (“empathy and morality”) AND (LIMIT-TO (EXACT KEYWORD, “Empathy”) OR LIMIT-TO (EXACT KEYWORD, “Morality”))	119
	PUBMED	“empathy” and “morality”	210
Total			394

Table 1. Search strategy.

Date	Databases	Search strategy	Number of results
17th June 2023	APA PsycINFO	Search terms: empathy and morality Search options Expanders - Apply equivalent subjects Restrict by Subject: - empathy Restrict by Subject: - morality Search Modes - Boolean/Phrase	65
	SCOPUS	ALL (“empathy and morality”) AND (LIMIT-TO (EXACT KEYWORD, “Empathy”) OR LIMIT-TO (EXACT KEYWORD, “Morality”))	119
	PUBMED	“empathy” and “morality”	210
Total			394

a) 

Selection criteria 

Articles published in any language addressing the relationship between empathy and morality were included. Clinical cases, editorials, guidelines and news were excluded. No articles were excluded based on publication date.

b) 

Data collection and analysis 

Eight researchers participated in the search and analysis of the quality and eligibility of the articles. The results were subjected to a joint critical review. Differing opinions were solved through a consensus among the investigators. The evaluation of the quality and level of evidence of the articles included were also discussed and decided by consensus.

After excluding duplicate articles and carefully reading the titles and abstracts, 56 works were included. Of these, 39 were eliminated. Considering the conceptual and philosophical dimension of the topic addressed, 15 articles selected from other sources were also considered in this selection.

Figure 1 shows the PRISMA flow diagram (Liberati et al., 2009; Shamseer et al., 2015). Table 2 presents the articles assessed in this review, and the most significant conclusions for the topic studied.

Table 2. Selected articles [*- articles included (Figure 1); ** - articles selected from other sources (Figure 1)].

Article	Article type	Conclusions
Altuna, B. (2018b). Empatía y moralidad. Dimensiones psicológicas y filosóficas de una relación compleja. Revista De Filosofia, 43(2). https://doi.org/10.5209/resf.62029 *	Narrative review	“From empathy do not derive ethical principles related to impartiality or equity”.
Babcock, S. E., Li, Y., Sinclair, V. M., Thomson, C., & Campbell, L. (2017c). Two replications of an investigation on empathy and utilitarian judgement across socioeconomic status. Scientific Data, 4(1). https://doi.org/10.1038/sdata.2016.129 **	Study replication + Meta-analysis	“Individuals with high socioeconomic status tend to make utilitarian decisions partly due to a lack of empathy”.
Bloom, P. (2017c). Empathy and its discontents. Trends in Cognitive Sciences, 21(1), 24–31. https://doi.org/10.1016/j.tics.2016.11.004 *	Opinion article	Empathy is an "experience of feeling what we think others are feeling". "Individuals with low empathy are more rational and less biased moral decision-makers". "There are reasons to believe that when it comes to making the world better, we are better off without empathy”.
Cameron, C. D., Conway, P., & Scheffer, J. A. (2022b). Empathy regulation, prosociality, and moral judgment. Current Opinion in Psychology, 44, 188–195. https://doi.org/10.1016/j.copsyc.2021.09.011 *	Comprehensive review	Elements other than empathy are necessary for a moral decision. Motivation and inter-relational empathic subjectivity modulate moral judgment.
Churcher, M. (2016c). Can empathy be a moral resource? A Smithean reply to Jesse Prinz. Dialogue, 55(3), 429–447. https://doi.org/10.1017/s0012217316000688 *	Opinion article	Adam Smith's concept of the impartial spectator supports the importance of empathy in morality.
Cuff, B. M. P., Brown, S., Taylor, L. K., & Howat, D. (2014d). Empathy: A review of the concept. Emotion Review, 8(2), 144–153. https://doi.org/10.1177/1754073914558466 **	Narrative revision	Empathy is an emotional (affective) response dependent on the interaction between trait capabilities and state influences. The resulting emotion derives from the perception of the other's state and its understanding, with the recognition that the origin of the emotion is outside the Self.
Decety, J., & Cowell, J. M. (2015c). Empathy, justice, and moral behaviour. Ajob Neuroscience, 6(3), 3–14. https://doi.org/10.1080/21507740.2015.1047055 *	Narrative revision	“Empathy produces social preferences that may conflict with justice and equity”.
Decety, J., & Cowell, J. M. (2014c). The complex relation between morality and empathy. Trends in Cognitive Sciences, 18(7), 337–339. https://doi.org/10.1016/j.tics.2014.04.008 *	Opinion article	To better characterise the relation with morality, it is essential to "abandon the term empathy" and use more "precise" concepts, such as "emotional sharing, empathic concern and taking an affective perspective."
Decety, J. (2010c). The neurodevelopment of empathy in humans. Developmental Neuroscience, 32(4), 257–267. https://doi.org/10.1159/000317771 *	Revision article	Empathy must be decomposed into sub-components related to specific brain areas to understand human development better.
Decety, J., & Cowell, J. M. (2018b). The Social Neuroscience of Empathy and its Relationship to Moral Behavior. The Wiley Blackwell Handbook of Forensic Neuroscience, 145–169. https://doi.org/10.1002/9781118650868.ch7 *	Book article	Empathy can lead to bias in moral judgments and decisions. In evolutionary terms, empathy is vital in caring for offspring and facilitating group life.
Decety, J., & Cowell, J. M. (2014f). Friends or Foes. Perspectives on Psychological Science, 9(5), 525–537. https://doi.org/10.1177/1745691614545130 *	Opinion article	"While there is a relation between empathy and morality, it is not as linear as it might seem. In addition, distinguishing between the different facets of empathy is of the utmost importance, as each uniquely influences moral cognition, predicting differential moral behaviour”.
Duan, C., & Sager, K. (2018c). Understanding Empathy. Oxford University Press. https://doi.org/10.1093/oxfordhb/9780199396511.013.62 *	Book article	Empathy is multidisciplinary, and it is not easy to define conceptually.
Ferrari, P. F. (2014b). The neuroscience of social relations. A comparative-based approach to empathy and the capacity to evaluate others' action value. Behaviour, 151(2–3), 297–313. https://doi.org/10.1163/1568539x-00003152 *	Research article	Multiple cognitive and emotional brain networks are essential for empathy and decision-making.
Fowler, Z., Law, K. W., & Gaesser, B. (2021). Against empathy bias: the moral value of equitable empathy. Psychological Science, 32(5), 766–779. https://doi.org/10.1177/0956797620979965 *	Research article	"Participants in two studies thought it was morally correct to empathise with socially closer people, although they felt it was morally more appropriate to show similar empathy and independent of social distance”.
Isern-Mas, C., & Sureda, A. (2019b). Why does empathy matter for morality? Análisis filosófico. https://doi.org/10.36446/af.2019.310 *	Opinion article	"Morality is not reduced to rational judgment, but necessarily presupposes prosocial preferences, motivation, and sensitivity to intersubjective demands”.
Johanson, M., Vaurio, O., Tiihonen, J., & Batalla, A. (2020). A systematic literature review of neuroimaging of psychopathic traits. Frontiers in Psychiatry, 10. https://doi.org/10.3389/fpsyt.2019.01027 **	Systematic revision	“Psychopathy has been associated with a dysfunction of the default mode network that has been linked to poor moral judgments". "Empathy-related brain regions were active in psychopaths when imagining themselves in pain, but inactive when imagining others in pain”.
Kauppinen, A. (2017b). Empathy as the moral sense? Philosophia. https://doi.org/10.1007/s11406-017-9816-1 *	Opinion article	A comprehensive, empathic process is a potential source of moral knowledge.
Lambe, L. J., Della Cioppa, V., Hong, I. K., & Craig, W. M. (2019). Standing up to bullying: a social-ecological review of peer defending in offline and online contexts. Aggression and Violent Behavior, 45, 51–74. https://doi.org/10.1016/j.avb.2018.05.007 **	Systematic revision	In the context of bullying, "defenders tend to have more empathy and less moral detachment”.
Lenzen, L. M., Donges, M. R., Eickhoff, S. B., & Poeppl, T. B. (2021). Exploring the neural correlates of (altered) moral cognition in psychopaths. Behavioral Sciences & the Law, 39(6), 731–740. https://doi.org/10.1002/bsl.2539 **	Meta-analysis	"The antisocial behaviour of psychopaths is due, at least in part, to structural brain dysfunctions of regions associated with moral cognition and emotion"; "Psychopaths have reduced activity in the dorsomedial prefrontal cortex (dmPFC) that has been implicated in social cognitions, which include empathy, morality, and theory of mind”.
Markowitz, A. J., Ryan, R., & Marsh, A. A. (2014). Neighbourhood income and the expression of callous–unemotional traits. European Child & Adolescent Psychiatry, 24(9), 1103–1118. https://doi.org/10.1007/s00787-014-0663-3 **	Cohort study	The environment and experience shape behaviour and reward-seeking, leading to the development of more or less adaptive traits and strategies. Insensitive non-emotional traits, including poor empathy, represent a robust hereditary pattern of socio-emotional response associated with an increased risk of persistent delinquent behaviour.
Masto, M. (2015). Empathy and Its Role in Morality. The Southern Journal of Philosophy, 53(1), 74–96. https://doi.org/10.1111/sjp.12097 **	Opinion article	"Empathy is indispensable to our moral lives”.
Maxwell, B., & Racine, E. (2010). Should empathic development be a priority in biomedical ethics teaching? A critical perspective. Cambridge Quarterly of Healthcare Ethics. https://doi.org/10.1017/s0963180110000320 **	Narrative revision	Compassionate empathy is a strong motivator of ethical behaviour, but empathic reactions often fall short of appropriate standards of moral judgment because they are so susceptible to familiarity bias.
Pascal, E. A. (2017b). Being similar while judging right and wrong: The effects of personal and situational similarity on moral judgements. International Journal of Psychology. https://doi.org/10.1002/ijop.12448 **	Cohort study	Moral judgment depends on perceived personal and situational familiarity due to two mechanisms: motivational (where the goal is to avoid blame and harm) and non-motivational (through Empathy and Sympathy).
Passos-Ferreira, C. (2015). In defence of empathy: A response to Prinz. Abstracta, 8(2), 31–51. **	Opinion article	"Empathy is a crucial element in morality and, in certain circumstances, is our best guide”.
Persson, I., & Savulescu, J. (2017b). The moral importance of reflective empathy. Neuroethics, 11(2), 183–193. https://doi.org/10.1007/s12152-017-9350-7 *	Opinion article	"Empathy can play an essential role in moral motivation, but it needs to be severely disciplined by other factors – in particular, Reason”.
Prinz, J. J. (2011). Is Empathy Necessary for Morality? Oxford University Press eBooks, 211–229. https://doi.org/10.1093/acprof:oso/9780199539956.003.0014 **	Opinion article	“Empathy is not necessary for the capabilities that are part of basic moral competence”.
Redford, L., & Ratliff, K. A. (2017). Empathy and humanitarianism predict preferential moral responsiveness to in-groups and out-groups. Journal of Social Psychology. https://doi.org/10.1080/00224545.2017.1412933 *	Research article	Empathy favours a preferential morality.
Schoeps, K., Mónaco, E., Cotolí, A., & Montoya-Castilla, I. (2020b). The impact of peer attachment on prosocial behaviour, emotional difficulties and conduct problems in adolescence: The mediating role of empathy. PLOS ONE, 15(1), e0227627. https://doi.org/10.1371/journal.pone.0227627 **	Cohort study	Emotional and cognitive empathy are two subtypes of empathy. Greater empathic capacity is associated with prosocial and altruistic behaviour and healthy socio-emotional functioning.
Simmons, A. T. (2013b). In defense of the moral significance of empathy. Ethical Theory and Moral Practice, 17(1), 97–111. https://doi.org/10.1007/s10677-013-9417-4 **	Opinion article	"Empathy is necessary and sufficient for morality as long as the individual possesses it in its two dimensions, cognitive and affective”.
Slote, M. (2010). The mandate of empathy. Dao-a Journal of Comparative Philosophy, 9(3), 303–307. https://doi.org/10.1007/s11712-010-9170-5 **	Opinion article	“Empathy is central to the moral life”.
Slote, M. (2016). The many faces of empathy. Philosophia, 45(3), 843–855. https://doi.org/10.1007/s11406-016-9703-1 **	Opinion article	"Empathy is a way of perceiving the moral virtues and vices of the people around us”.
Zucchelli, M. M., & Ugazio, G. (2019). Cognitive-emotional and inhibitory deficits as a window to moral decision-making difficulties related to exposure to violence. Frontiers in Psychology, 10. https://doi.org/10.3389/fpsyg.2019.01427 *	Narrative revision	“Empathic ability plays a vital role in the development of morality”. "Exposure to violence substantially increases the dysfunction of necessary mechanisms (such as empathy) for morally sound decision making”.

Table 2. Selected articles [*- articles included (Figure 1); ** - articles selected from other sources (Figure 1)].

Article	Article type	Conclusions
Altuna, B. (2018b). Empatía y moralidad. Dimensiones psicológicas y filosóficas de una relación compleja. Revista De Filosofia, 43(2). https://doi.org/10.5209/resf.62029 *	Narrative review	“From empathy do not derive ethical principles related to impartiality or equity”.
Babcock, S. E., Li, Y., Sinclair, V. M., Thomson, C., & Campbell, L. (2017c). Two replications of an investigation on empathy and utilitarian judgement across socioeconomic status. Scientific Data, 4(1). https://doi.org/10.1038/sdata.2016.129 **	Study replication + Meta-analysis	“Individuals with high socioeconomic status tend to make utilitarian decisions partly due to a lack of empathy”.
Bloom, P. (2017c). Empathy and its discontents. Trends in Cognitive Sciences, 21(1), 24–31. https://doi.org/10.1016/j.tics.2016.11.004 *	Opinion article	Empathy is an "experience of feeling what we think others are feeling". "Individuals with low empathy are more rational and less biased moral decision-makers". "There are reasons to believe that when it comes to making the world better, we are better off without empathy”.
Cameron, C. D., Conway, P., & Scheffer, J. A. (2022b). Empathy regulation, prosociality, and moral judgment. Current Opinion in Psychology, 44, 188–195. https://doi.org/10.1016/j.copsyc.2021.09.011 *	Comprehensive review	Elements other than empathy are necessary for a moral decision. Motivation and inter-relational empathic subjectivity modulate moral judgment.
Churcher, M. (2016c). Can empathy be a moral resource? A Smithean reply to Jesse Prinz. Dialogue, 55(3), 429–447. https://doi.org/10.1017/s0012217316000688 *	Opinion article	Adam Smith's concept of the impartial spectator supports the importance of empathy in morality.
Cuff, B. M. P., Brown, S., Taylor, L. K., & Howat, D. (2014d). Empathy: A review of the concept. Emotion Review, 8(2), 144–153. https://doi.org/10.1177/1754073914558466 **	Narrative revision	Empathy is an emotional (affective) response dependent on the interaction between trait capabilities and state influences. The resulting emotion derives from the perception of the other's state and its understanding, with the recognition that the origin of the emotion is outside the Self.
Decety, J., & Cowell, J. M. (2015c). Empathy, justice, and moral behaviour. Ajob Neuroscience, 6(3), 3–14. https://doi.org/10.1080/21507740.2015.1047055 *	Narrative revision	“Empathy produces social preferences that may conflict with justice and equity”.
Decety, J., & Cowell, J. M. (2014c). The complex relation between morality and empathy. Trends in Cognitive Sciences, 18(7), 337–339. https://doi.org/10.1016/j.tics.2014.04.008 *	Opinion article	To better characterise the relation with morality, it is essential to "abandon the term empathy" and use more "precise" concepts, such as "emotional sharing, empathic concern and taking an affective perspective."
Decety, J. (2010c). The neurodevelopment of empathy in humans. Developmental Neuroscience, 32(4), 257–267. https://doi.org/10.1159/000317771 *	Revision article	Empathy must be decomposed into sub-components related to specific brain areas to understand human development better.
Decety, J., & Cowell, J. M. (2018b). The Social Neuroscience of Empathy and its Relationship to Moral Behavior. The Wiley Blackwell Handbook of Forensic Neuroscience, 145–169. https://doi.org/10.1002/9781118650868.ch7 *	Book article	Empathy can lead to bias in moral judgments and decisions. In evolutionary terms, empathy is vital in caring for offspring and facilitating group life.
Decety, J., & Cowell, J. M. (2014f). Friends or Foes. Perspectives on Psychological Science, 9(5), 525–537. https://doi.org/10.1177/1745691614545130 *	Opinion article	"While there is a relation between empathy and morality, it is not as linear as it might seem. In addition, distinguishing between the different facets of empathy is of the utmost importance, as each uniquely influences moral cognition, predicting differential moral behaviour”.
Duan, C., & Sager, K. (2018c). Understanding Empathy. Oxford University Press. https://doi.org/10.1093/oxfordhb/9780199396511.013.62 *	Book article	Empathy is multidisciplinary, and it is not easy to define conceptually.
Ferrari, P. F. (2014b). The neuroscience of social relations. A comparative-based approach to empathy and the capacity to evaluate others' action value. Behaviour, 151(2–3), 297–313. https://doi.org/10.1163/1568539x-00003152 *	Research article	Multiple cognitive and emotional brain networks are essential for empathy and decision-making.
Fowler, Z., Law, K. W., & Gaesser, B. (2021). Against empathy bias: the moral value of equitable empathy. Psychological Science, 32(5), 766–779. https://doi.org/10.1177/0956797620979965 *	Research article	"Participants in two studies thought it was morally correct to empathise with socially closer people, although they felt it was morally more appropriate to show similar empathy and independent of social distance”.
Isern-Mas, C., & Sureda, A. (2019b). Why does empathy matter for morality? Análisis filosófico. https://doi.org/10.36446/af.2019.310 *	Opinion article	"Morality is not reduced to rational judgment, but necessarily presupposes prosocial preferences, motivation, and sensitivity to intersubjective demands”.
Johanson, M., Vaurio, O., Tiihonen, J., & Batalla, A. (2020). A systematic literature review of neuroimaging of psychopathic traits. Frontiers in Psychiatry, 10. https://doi.org/10.3389/fpsyt.2019.01027 **	Systematic revision	“Psychopathy has been associated with a dysfunction of the default mode network that has been linked to poor moral judgments". "Empathy-related brain regions were active in psychopaths when imagining themselves in pain, but inactive when imagining others in pain”.
Kauppinen, A. (2017b). Empathy as the moral sense? Philosophia. https://doi.org/10.1007/s11406-017-9816-1 *	Opinion article	A comprehensive, empathic process is a potential source of moral knowledge.
Lambe, L. J., Della Cioppa, V., Hong, I. K., & Craig, W. M. (2019). Standing up to bullying: a social-ecological review of peer defending in offline and online contexts. Aggression and Violent Behavior, 45, 51–74. https://doi.org/10.1016/j.avb.2018.05.007 **	Systematic revision	In the context of bullying, "defenders tend to have more empathy and less moral detachment”.
Lenzen, L. M., Donges, M. R., Eickhoff, S. B., & Poeppl, T. B. (2021). Exploring the neural correlates of (altered) moral cognition in psychopaths. Behavioral Sciences & the Law, 39(6), 731–740. https://doi.org/10.1002/bsl.2539 **	Meta-analysis	"The antisocial behaviour of psychopaths is due, at least in part, to structural brain dysfunctions of regions associated with moral cognition and emotion"; "Psychopaths have reduced activity in the dorsomedial prefrontal cortex (dmPFC) that has been implicated in social cognitions, which include empathy, morality, and theory of mind”.
Markowitz, A. J., Ryan, R., & Marsh, A. A. (2014). Neighbourhood income and the expression of callous–unemotional traits. European Child & Adolescent Psychiatry, 24(9), 1103–1118. https://doi.org/10.1007/s00787-014-0663-3 **	Cohort study	The environment and experience shape behaviour and reward-seeking, leading to the development of more or less adaptive traits and strategies. Insensitive non-emotional traits, including poor empathy, represent a robust hereditary pattern of socio-emotional response associated with an increased risk of persistent delinquent behaviour.
Masto, M. (2015). Empathy and Its Role in Morality. The Southern Journal of Philosophy, 53(1), 74–96. https://doi.org/10.1111/sjp.12097 **	Opinion article	"Empathy is indispensable to our moral lives”.
Maxwell, B., & Racine, E. (2010). Should empathic development be a priority in biomedical ethics teaching? A critical perspective. Cambridge Quarterly of Healthcare Ethics. https://doi.org/10.1017/s0963180110000320 **	Narrative revision	Compassionate empathy is a strong motivator of ethical behaviour, but empathic reactions often fall short of appropriate standards of moral judgment because they are so susceptible to familiarity bias.
Pascal, E. A. (2017b). Being similar while judging right and wrong: The effects of personal and situational similarity on moral judgements. International Journal of Psychology. https://doi.org/10.1002/ijop.12448 **	Cohort study	Moral judgment depends on perceived personal and situational familiarity due to two mechanisms: motivational (where the goal is to avoid blame and harm) and non-motivational (through Empathy and Sympathy).
Passos-Ferreira, C. (2015). In defence of empathy: A response to Prinz. Abstracta, 8(2), 31–51. **	Opinion article	"Empathy is a crucial element in morality and, in certain circumstances, is our best guide”.
Persson, I., & Savulescu, J. (2017b). The moral importance of reflective empathy. Neuroethics, 11(2), 183–193. https://doi.org/10.1007/s12152-017-9350-7 *	Opinion article	"Empathy can play an essential role in moral motivation, but it needs to be severely disciplined by other factors – in particular, Reason”.
Prinz, J. J. (2011). Is Empathy Necessary for Morality? Oxford University Press eBooks, 211–229. https://doi.org/10.1093/acprof:oso/9780199539956.003.0014 **	Opinion article	“Empathy is not necessary for the capabilities that are part of basic moral competence”.
Redford, L., & Ratliff, K. A. (2017). Empathy and humanitarianism predict preferential moral responsiveness to in-groups and out-groups. Journal of Social Psychology. https://doi.org/10.1080/00224545.2017.1412933 *	Research article	Empathy favours a preferential morality.
Schoeps, K., Mónaco, E., Cotolí, A., & Montoya-Castilla, I. (2020b). The impact of peer attachment on prosocial behaviour, emotional difficulties and conduct problems in adolescence: The mediating role of empathy. PLOS ONE, 15(1), e0227627. https://doi.org/10.1371/journal.pone.0227627 **	Cohort study	Emotional and cognitive empathy are two subtypes of empathy. Greater empathic capacity is associated with prosocial and altruistic behaviour and healthy socio-emotional functioning.
Simmons, A. T. (2013b). In defense of the moral significance of empathy. Ethical Theory and Moral Practice, 17(1), 97–111. https://doi.org/10.1007/s10677-013-9417-4 **	Opinion article	"Empathy is necessary and sufficient for morality as long as the individual possesses it in its two dimensions, cognitive and affective”.
Slote, M. (2010). The mandate of empathy. Dao-a Journal of Comparative Philosophy, 9(3), 303–307. https://doi.org/10.1007/s11712-010-9170-5 **	Opinion article	“Empathy is central to the moral life”.
Slote, M. (2016). The many faces of empathy. Philosophia, 45(3), 843–855. https://doi.org/10.1007/s11406-016-9703-1 **	Opinion article	"Empathy is a way of perceiving the moral virtues and vices of the people around us”.
Zucchelli, M. M., & Ugazio, G. (2019). Cognitive-emotional and inhibitory deficits as a window to moral decision-making difficulties related to exposure to violence. Frontiers in Psychology, 10. https://doi.org/10.3389/fpsyg.2019.01427 *	Narrative revision	“Empathic ability plays a vital role in the development of morality”. "Exposure to violence substantially increases the dysfunction of necessary mechanisms (such as empathy) for morally sound decision making”.

4. Results

a) 

Summary of the results

1)

Empathy is commonly presented as an exclusively or predominantly emotional process;

2)

Empathy is frequently divided into subtypes;

3)

Empathy is associated with certain specific brain areas;

4)

Empathy is referred to as a source of bias in moral decisions;

5)

It is stated that to be empathetic, one must feel what the other is feeling;

6)

The partiality of empathy is presented as an evolutionary advantage.

5. Discussion

a) 

We are Brain

The Homo Sapiens brain allows complex and exclusive functions, including abstract, reflective and philosophical thinking, as well as the potential for the development of a unique personality in close and continuous relation with the external environment (Sherwood et al., 2008; Tost et al., 2015). However, due to Cartesian dualism (Thibaut, 2018), which still significantly hovers over civil and medical-scientific societies, there continues to be a resistance to attributing an organic substrate to personality, behaviours and emotions.

Deep down, there is a generalised misunderstanding and refusal to tacitly assume that human beings are (in the sense of Being, of Existing) brains. Our personality and, therefore, the way we act, react and get emotional is the result of the functioning of this organ. This does not mean that external factors do not influence us. What makes the brain idiosyncratically complex and distinct is that its development is affected by social experiences (Riccelli et al., 2017). For example, a hepatocyte will not be directly compromised if children experience frequent and violent arguments between their parents throughout their growth. However, depending on the individual's greater or lesser genetic resilience, neuronal development may be more or less affected, conditioning the development of a personality with greater or lesser weaknesses (Fairchild et al., 2016). That is why a healthy social and family environment is so crucial for the balanced growth of a human being, minimising the probability of suffering from a psychiatric illness (Wille et al., 2008). We die when the brain dies precisely because our personality (our Self) disappears forever. This misunderstanding of the brain as the substrate of our Being and of our ability to, through reflective thinking, extrapolate the most diverse theories and ethical-philosophical, esoteric and mystical considerations can make it difficult to understand that there is no appreciation of what is morally acceptable outside the inner space of the person. Morality is an internal ethical judgment that stems from the individual’s relation with everything and everyone around them and seeks to guide human action towards harmony within diversity. Empathy, in turn, according to the conceptual model that we will present next, is an essential process for determining this morality.

b) 

Conceptual model of empathy and its relation with morality

The core problem in approaching empathy is often understanding it as an exclusively or predominantly emotional process, subjective and unable, at least in some circumstances, to contribute to the best possible moral decision. In the clinical context of the therapeutic alliance between a doctor and a patient, Jaspers (2000) alludes to empathy as putting ourselves in others’ shoes and understanding their experiences through a comparison with ours. According to this notion, empathy is a process that simultaneously uses emotional and cognitive competencies in the relational context. Thus, the potential uniqueness of empathy arises from a parallel, synchronous and harmonious interaction between superior cognitive aptitudes and a unique and complex affective ability. A dog, for example, may feel and react to the owner's sadness (sympathy ≠ empathy), but it will not be able to put itself in the owner’s shoes, understand the reasons for his sadness and conclude that if it were going through the same, it would feel the same way. A psychopath with total affective coldness, on the other hand, may retain the ability to put himself in someone else's shoes, but he will not feel or value the other emotional state.

Given the integrative and networked functioning of the human brain, the classic division between Reason and Emotion is artificial, particularly when we consider the concept of empathy, where the presence and integrity of both (and the systems that regulate them) seem necessary. Emotion without Reason is a primary and potentially instinctive affective expression. Reason without Emotion is a superior cognitive aptitude devoid of the ability to feel and value other people's emotional states. In these two situations, it may not be possible to establish a balanced moral judgment, such as determining whether killing an innocent person to satisfy a basic need such as hunger (in the circumstances of a total absence of other food resources) will be morally acceptable. Without the ability of Reason, food deprivation will induce discomfort and despair of such intensity that it will inevitably incite to kill. On the other hand, without the affective-emotional capacity, Reason will prevail over Emotion, and logic will determine that one kills the other to survive.

Therefore, we understand empathy has been wrongly defined as an exclusively or predominantly emotional mechanism or artificially divided into subtypes (e.g., emotional, cognitive). These conceptualisations have generated great confusion about determining its relevance to morality. Hence, we propose a concept of empathy to clarify its importance for moral decisions. We affirm that empathy is neither an emotion nor a cognition, nor is it divided into subtypes. There is no support in the brain studies analysed for this subdivision, nor can it be said that a brain area is related explicitly to empathy (Decety, 2010; Yoder and Decety, 2017; Ferrari, 2014). Consequently, we define empathy as a unique and distinct human neuropsychological capacity dependent on the proper functioning of several brain areas, which balances the scales of Emotion and Reason, allowing moral decisions to be as reflected and pondered as possible in the most diverse circumstances and contexts. (Figure 2).

There is an ideal stage where empathy promotes a perfect balance between Reason and Emotion, giving rise to the most thoughtful and pondered moral decision possible (green line in Figure 2) and the extremes (red dashed in Figure 2) where no empathy occurs. A dramatic oscillation between Reason and Emotion instigates an absolute domination of one over the other and a volatile and uncertain moral judgment and decision. In these extremes, the individual's specific situation and personality determine the predominance of one dimension (Reason or Emotion) over the other. Thereby, for example, a psychopath completely lacking in empathy makes overly rational or emotional moral decisions depending on the circumstance. He may have the brutal coldness of premeditated and planned murder of a group of individuals for his financial gain or the impulsiveness of being suddenly violent with someone in his sphere that insults his "honour". Between the ideal (green line in Figure 2) and the extremes (dashed red lines in Figure 2), there is a whole empathic spectrum (dashed blue arrows in Figure 2) that contributes to more or less thoughtful moral decisions. It is important to emphasise that the ideal does not mean immaculate moral answers that do not leave doubts or ethical anxiety, but the empathic ability to balance Reason and Emotion as best as possible to reach a moral solution to the concrete problem with which one is faced. There are many potentially irresolvable ethical dilemmas, that is, without unquestionable and universal moral answers. Therefore, any decision can include morally acceptable and unacceptable aspects.

In one of the final scenes of the 1993 film “The Good Son”, a mother (Susan) is faced with the dilemma of having to choose between saving the life of her 12-year-old firstborn son Henry (who she knows has been responsible for the death of her youngest son) and that of her nephew Mark of the same age. Susan chooses to save her nephew. This situation perfectly illustrates how an answer to a dilemma can leave residual ethical anguish and permanent questioning from then on about its lawfulness. Would the mother make the same decision if she could go back? Here, we argue that Susan's decision (despite being far from perfect and unquestionable) resulted from a process of balance between Reason and Emotion promoted by empathy. Under the domination of the extremes of Figure 2, it would be expected that Reason would lead her to choose her nephew (an innocent child of good character) and Emotion her son (a merciless murderer). This film also raises another important issue. Although more and more, especially in the Western world, a primacy of the beautiful over the ugly is being nurtured (hiding aversive realities such as cruelty), the truth is that human nature is dichotomous. That is, it oscillates between innate evil and goodness. Without disregarding the noticeable positive and negative effects that the environment can have on the development of our character, the truth is that genetics can overcome the environment. The tender and stable environment where Henry grew up failed to model his mischievous temper. Mark, on the other hand, despite dealing with difficult times (like the death of his mother), had a docile and harmonious personality with excellent coping resources.

Our model responds to moral judgments in interpersonal relations and includes a solution to the dimension of the concept of "Einfühlung", from which the word empathy emerged (Ganczarek et al., 2018). In other words, empathy is also essential for moral decisions where non-humans are involved. Before a lost inanimate object (e.g., a painting, a watch) or a pet, if endowed with empathy, an individual will be able to assess whether stealing it is morally lawful. Empathy's induced balance between Reason and Emotion will evaluate whether the action is morally wrong in itself (e.g., even if no negative consequences are apparent, perhaps it would be better, in such a circumstance, to take the watch to a lost and found and only keep it if no one claims it) or because it will undoubtedly damage (emotionally or financially) someone else. At the extremes (without empathy), once again, the decision will be volatile and may not be the most appropriate. We are entirely left to the chance of the moment.

In summary, our model defines Empathy as a distinct human neuropsychological capacity that seeks to balance Reason and Emotion to allow the most thoughtful and pondered moral decisions possible. At the same time, it recognises that, in many circumstances, immaculate moral judgments do not exist. As with any other domain, we are born with an empathic potential that can be more or less developed in a close and continuous inter-influence between genetics and the environment.

Empathy allows us to calibrate our judgements and decisions in clinical contexts (e.g., palliative care), making them as secular as possible, scientifically centred and adapted to the patient's needs. It promotes respect for others' beliefs and choices. Before a dying patient, for example, a doctor with high empathic skills can put personal beliefs aside and act according to the patient and family's wishes and autonomy.

c) 

Critical reflection

Analysing the articles selected for this scoping review allowed us to verify that the approach to the relation between empathy and morality has had several limitations.

First, there is always a significant variability of the concept, which undermines, from the outset, the clairvoyance of the discussion between the defenders and opponents of empathy as a fundamental element of morality. One side's arguments are debated and refuted by the other with personally biased notions, often with overlapping ideas or poor differential delimitation. This debate could contribute to an eventual progressive refinement of the concept. However, the discussion is already ancient, so it would be expected that a consensus on what empathy is already existed. When one decides to test whether a variable exerts a relevant influence on another, it is convenient that, from the outset, there is a clear conceptualisation of the variables involved. Even those endowed with subjectivity are often conceptually well-defined. For example, no one doubts what sadness is, although we can interpret its intensity and, ultimately, its putative presence in another person with variable degrees. Thus, when we seek to determine whether or not empathy is relevant to morality and to compare arguments and studies, it would be helpful to have a consensus on its definition first.

Second, although several selected studies and opinion articles consider empathy a vital element of morality, none assumes it is necessary in all circumstances. In addition, they approach it only from a relational perspective between human beings, not considering objects, animals or nature.

Third, the allusion that empathy does not serve morality because it biases moral decisions based on personal proximity (Pascal, 2017; Martineau et al., 2019; Decety and Cowell, 2015; Fowler et al., 2021; Redford and Ratliff, 2017) is fallacious and results from its improper definition and confusion with the concept of sympathy. Understandably, we are more sympathetic to the people with whom we share our personal lives. However, this does not mean that, despite the possible latent pressure to favour these people when making moral decisions, we will do so. As we presented, empathy will precisely seek to mitigate or eliminate this bias, promoting a balance between Reason and Emotion to allow the most thoughtful and pondered moral judgment possible. We sympathise more with our peers, but we can morally consider, through empathy, strangers and loved ones alike.

Finally, despite the topographical conceptualisation that helps us clinically and allows us to understand which areas are most associated with specific functions, the human brain works in an integrated and networked way. Unlike other cells in the body, neurons that perform a specific function can replace neighbouring neurons destroyed, for example, by ischemia that performed a different task. (Wang et al. 2021). Furthermore, the impairment of a particular activity generally attributed to a specific brain area may result from a dysfunction or injury in another brain area (Young, 2014). Therefore, the identification of a specific brain area (such as the ventromedial prefrontal cortex or the dorsomedial prefrontal cortex) as the centre of morality or empathy (Ferrari, 2014b) is reductive, even more so when we consider functions whose complexity necessarily requires the involvement of other areas, such as the limbic, sensory and motor systems. Thus, studies that seek to relate certain brain regions to morality and empathy, mainly using functional neuroimaging assessment of psychopaths, have several conceptual, methodological and phenomenological limitations (Lenzen et al., 2021; Blair, 2007).

6. Conclusion

Empathy is an ancient topic whose definition and procedural conceptualisation have yet to reach a clear-cut consensus. Thus, studying its importance to morality has been challenging, giving rise to various divergent and confused opinions and conclusions. This scoping review revealed that empathy is commonly presented as an exclusively or predominantly emotional process, often conceptually divided into subtypes, associated with certain specific brain areas and referred to as a source of bias in moral decisions. These are artificial findings with poor argumentative and scientific support. Our operational model of empathy responds to several of these limitations.

Empathy is the cross-cultural mainstay of morality. We recognise, for example, that empathy is evolutionarily advantageous for the human species, but not because it allows for partiality in the defense of specific groups or individuals with whom we have closer relations (confusion with sympathy, love, attachment). On the contrary, it contributes to the most impartial and righteous moral decisions possible between various groups and individuals, whether they are more or less close.

7. Research Limitations

Considering the scope and complexity of the subject addressed, some relevant papers may still need to be identified and included. However, we tried to significantly minimise this potential bias with the number of participants in the research, the criteria used, the careful analysis of the texts and the reading of the complementary bibliography.