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Le Grand bouleversement. Le système bio-Terre et l'éon Anthropozoïque

Abstract : This article revisits the central role played by life throughout the earth's and climate's history, right up to the present day with the appearance of Homo-sapiens. It redefines the subdivisions of the history of the Earth system, notably the largest of them, the eon. He presents the hypothesis of a new and fifth eon, the Anthropozoic ("human animals" eon), succeeding the Phanerozoic ("visible animals" eon), which itself succeeded the Proterozoic ("first animals" eon). Finally, he proposes the notion of a bio-Earth system. The whole demonstration is based on the concepts of the complex's thinking. The bifurcation towards the fourth eon, the Phanerozoic, which began 541 million years ago, corresponds to the appearance of a multitude of animals, then plants, which resulted in a living world organized into ecosystems where animals, vegetables, fungi, bacteria, archaea and viruses cohabit in non-static equilibrium. Since then, these Phanerozoic ecosystems have constantly played a major role in the balance and evolution of the bio-Earth system and its climate. Homo-sapiens, a recent emergence within the living world, has profoundly modified and continues to modify the state of the living world. Animals and plants have been increasingly taken out of ecosystems to be domesticated and submitted to humanity. The Phanerozoic ecosystems have access to increasingly restricted areas. Finally, these ecosystems are subject to unprecedented constraints: extinction of many species, if not a reduction in their populations, especially predators at the top of the food chain; various forms of pollution... These constraints or disturbances are now having a direct impact on ocean life - a key climate regulator. More generally, Homo-sapiens is modifying the state of the entire bio-Earth system and has triggered a global warming that could get out of control. Faced with this situation, with largely unpredictable developments, the challenge for Homo-sapiens is immense. It requires us to free ourselves from a focus on quantified and mathematical knowledge and to invoke, with humility and lucidity, the precautionary principle. In particular, it requires overcoming a conception of humanity itself which, by failing to take into consideration or marginalizing emergencies, complexity and unpredictability, forms the basis of theories according to which a collapse would be inevitable.
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https://hal.archives-ouvertes.fr/hal-02503252
Contributor : Marc Delepouve <>
Submitted on : Tuesday, March 31, 2020 - 1:00:09 PM
Last modification on : Wednesday, April 29, 2020 - 12:10:08 PM

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Marc Delepouve. Le Grand bouleversement. Le système bio-Terre et l'éon Anthropozoïque. 2020. ⟨hal-02503252v2⟩

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