Wikipedia: "The Gaia hypothesis... proposes that living organisms interact with their inorganic surroundings on Earth to form a synergistic and self-regulating,

Wikipedia: "The Gaia hypothesis... proposes that living organisms interact with their inorganic surroundings on Earth to form a synergistic and self-regulating, complex system that helps to maintain and perpetuate the conditions for life on the planet." [my emphasis.] this rosy view has to contend with the fact that once (the great oxygenation event), and possibly twice (the cryogenian), life on Earth was making the environment inhospitable for itself, and at least in the first case, had to evolve to avoid a problem it had created for itself.