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Area of Science:

  • Evolutionary Biology
  • Earth System Science
  • Philosophy of Science

Background:

  • James Lovelock's Gaia hypothesis proposes Earth functions as a complex, self-regulating system.
  • The hypothesis faces challenges within traditional Darwinian natural selection frameworks, particularly regarding reproduction and inheritance.
  • Peter Godfrey-Smith's concept of 'too many parents' highlights evolutionary selection challenges for the Gaia hypothesis.

Purpose of the Study:

  • To analyze why the Gaia hypothesis has been problematic for traditional Darwinian evolution.
  • To propose modifications to evolutionary theory that would accommodate the Gaia hypothesis.
  • To explore the implications of alternative evolutionary perspectives for understanding Earth system dynamics.

Main Methods:

  • Conceptual analysis of evolutionary theory, specifically Lewontin's Recipe for natural selection.
  • Examination of the Gaia hypothesis through the lens of reproduction and inheritance.
  • Integration of concepts like differential persistence, part/whole relationships, and the gene's-eye view.

Main Results:

  • The Gaia hypothesis, as traditionally understood, does not fit standard models of natural selection due to its complex origins and lack of clear reproduction.
  • Extending Lewontin's Recipe to include differential persistence offers a potential pathway for evolutionary selection.
  • Adopting a 'gene's-eye view' or recognizing part/whole relationships as reproduction could reconcile Gaia with evolutionary theory.

Conclusions:

  • Modifications to evolutionary theory, such as incorporating differential persistence or redefining reproduction, are necessary to make the Gaia hypothesis scientifically coherent.
  • The 'It's the song not the singer(s)' theory provides a framework for understanding how systems like Gaia, multispecies communities, and holobionts can be subject to evolutionary processes.
  • Reconciling Gaia with evolutionary biology opens new avenues for studying the co-evolution of life and Earth systems.