Natural Selection beyond Life? A Workshop Report

Charlat, S.; Ariew, A.; Bourrat, P.; Ferreira Ruiz, M.; Heams, T.; Huneman, P.; Krishna, S.; Lachmann, M.; Lartillot, N.; Le Sergeant d'Hendecourt, L.; et al. Natural Selection beyond Life? A Workshop Report. Life 2021, 11, 1051. https://doi.org/10.3390/life11101051 Charlat, S.; Ariew, A.; Bourrat, P.; Ferreira Ruiz, M.; Heams, T.; Huneman, P.; Krishna, S.; Lachmann, M.; Lartillot, N.; Le Sergeant d'Hendecourt, L.; et al. Natural Selection beyond Life? A Workshop Report. Life 2021, 11, 1051. https://doi.org/10.3390/life11101051

Abstract

Natural selection is commonly seen not just as an explanation for adaptive evolution, but as the inevitable consequence of “heritable variation in fitness among individuals”. Although it remains embedded in biological concepts, such a formalisation makes it tempting to explore whether this precondition may be met not only in life as we know it, but also in other physical systems. This would imply that these systems are subject to natural selection and may perhaps be investigated in a biological framework, where properties are typically examined in light of their putative functions. Here we relate the major questions that were debated during a three-day workshop[1] devoted to discussing whether natural selection may take place in non-living physical systems. We start this report with a brief overview of research fields dealing with “life-like” or “proto-biotic” systems, where mimicking evolution by natural selection in test tubes stands as a major objective. We contend the challenge may be as much conceptual as technical. Taking the problem from a physical angle, we then discuss the framework of dissipative structures. Although life is viewed in this context as a particular case within a larger ensemble of physical phenomena, this approach does not provide general principles from which natural selection could be derived. Turning back to evolutionary biology, we ask to what extent the most general formulations of the necessary conditions or signatures of natural selection may be applicable beyond biology. In our view, such a cross-disciplinary jump is in large part impeded by reliance on individuality as a central yet implicit and loosely defined concept. Overall, these discussions thus lead us to conjecture that understanding, in physico-chemical terms, how individuality emerges and how it can be recognised, will be essential in the search for instances of evolution by natural selection outside of living systems. [1] Natural Selection Beyond Life? Observing the physico-chemical world through Darwinian glasses; 12-15 November 2019 - Institut d'Etudes Scientifiques, Cargèse, France

Keywords

Natural selection; individuality; levels of selection; evolutionary biology; physics; philosophy of biology; exobiology; origins of life

Subject

Physical Sciences, Fluids and Plasmas Physics

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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