Greek philosopher Pythagoras was one of the earliest known vegetarians and was so because he:

Question

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Pythagoras believed in the concept of transmigration of souls, which stated that the soul of a human being could be reborn in the body of an animal. Thus, he believed in the kinship among all living creatures and advocated vegetarianism as a way to avoid harming other creatures who could be human in their next life.

Greek Philosopher Pythagoras Was One of the Earliest Known Vegetarians