Darius, the Great King of the Persian Empire, once called together some Greeks and some Callatians, an Indian people, who were at his court. To the Greeks, who cremated their dead, he asked what it would take for them to eat their dead fathers. The Greeks were abhorred, and protested that they would not do such an act for any amount of money. He then asked the Callatians, with an interpreter for the Greeks, what it would for them to cremate their dead fathers, and they protested as strongly as the Greeks had, for the custom of the Callatians was to eat their dead. “Don’t mention such horrors!” they cried. Thusly Darius showed that it is custom, not reason, that guides many of our actions.