The idea that Earth may operate as a single, self-regulating, living organism has existed for decades, emerging in the 1970s as the Gaia hypothesis. In this excerpt from "Gaia Wakes: Earth's Emerging Consciousness in an Age of Environmental Devastation" (Columbia University Press, 2025), economic development and peacebuilding expert Topher McDougal describes how Earth might acquire a planetary brain powered by artificial intelligence (AI) in what he dubs the "Gaiacephalos hypothesis." McDougal argues that this giant, global brain could benefit humanity by boosting the complexity of life on Earth and ultimately secure a more sustainable future.
