James Lovelock

Life clearly does more than adapt to the Earth. It changes the Earth to its own purposes. Evolution is a tightly coupled dance, with life and the material environment as partners. From the dance emerges the entity Gaia.

The reason why Broken Men only became Untouchables was because in addition to being Buddhists, they retained their habit of beef-eating, which gave additional ground for offence to the Brahmins to carry their new-found love and reverence to the cow to its logical conclusion.