In the Fall of 1930 Will Durant found himself outside his home in Lake Hill, New York, raking leaves. He was approached by a well-dressed man who told him in a quiet tone that he was going to kill himself unless the philosopher could give him a valid reason not to. Not having the time to wax philosophic on the matter, Durant did his best to furnish the man with reasons to continue his existence. Haunted by the encounter with the despondent stranger,...