Pythagoras, the ancient Greek mathematician, did not himself eat fava beans in any form; in fact, he banned his followers from eating them. Cultural geographer Frederick Simoons disputes the contention that Pythagoras established that ban because he recognized the danger of favism, a disease that afflicts genetically-predisposed individuals who consume fava beans. Contradicting more deterministic explanations of history, Simoons argues that ritual considerations led to the Pythagorean ban.
In his fascinating and thorough new study, Simoons examines plants associated with ritual purity,...