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Gaia – The Earth is an Organism (Not a Darwinian Individual)

Meynell, Letitia and Lopez, Andrew (2025) Gaia – The Earth is an Organism (Not a Darwinian Individual). [Preprint]

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Abstract

The Gaia hypothesis has been roundly criticized by a number of evolutionary biologists, who maintain that no plausible evolutionary account is compatible with the idea that the Earth is an organism. These criticisms focus on the observation that Gaia is not the kind of entity that can be
explained through evolutionary models. After all, Gaia does not belong to a population of Gaias and does not reproduce, and thus cannot evolve through natural selection. In this paper, we hope to deflate the force of such criticisms by showing that they have the wrong target. By clearly distinguishing Darwinian individuals from organisms and identifying the distinctive features of organismality, we show that the claim that Gaia is an organism does not fall prey to the criticisms commonly made. Drawing from theoretical work on holobionts we clarify how, despite not being a Darwinian individual, it is plausible to think that Gaia has features that have been shaped by natural selection.


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Item Type: Preprint
Creators:
CreatorsEmailORCID
Meynell, LetitiaLetitia.Meynell@dal.ca0000-0001-8467-5598
Lopez, Andrewandrew.lopez@colostate.edu
Keywords: Darwinian individuals; Gaia hypothesis; holobionts; organismality; Richard Dawkins
Subjects: Specific Sciences > Biology > Evolutionary Theory
Depositing User: Dr. Letitia Meynell
Date Deposited: 15 Oct 2025 11:12
Last Modified: 15 Oct 2025 11:12
Item ID: 26926
Subjects: Specific Sciences > Biology > Evolutionary Theory
Date: 2025
URI: https://philsci-archive.pitt.edu/id/eprint/26926

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