An ancient Greek philosopher from the sixth century B.C.E. Among other things, Pythagoras was known for his belief in the transmigration of souls, which assumes that the human soul can pass to another person, object, or animal upon death. Milton implies that Pythagoras’s belief in the transmigration of souls originated with the Druids, the ancient people of the British Isles. Through Milton’s reference to Pythagoras, he implies that it was the British who influenced and inspired the Greeks, not the other way around.