Lynn Margulis (1938–2011) was an American evolutionary biologist.
Gaia, at least the way I interpret it, is more a worldview, and that worldview is that the planet is a living system. Obviously this dates back millennia to all kinds of shamanist, animist, indigenous cultures. But in more modern times, James Lovelock and Lynn Margulis’s Gaia hypothesis is from the '70s.
Memo Akten, Memo Akten on Rituals as Algorithms