The author of How to Be a Stoic asks what might be philosophy's ultimate question: can we learn to be better people? Is good character something that can be taught? In 430 BCE, Socrates set out to teach the vain, power-seeking Athenian statesman Alcibiades how to be a good person--and failed spectacularly. Alcibiades went on to beguile his city into a hopeless war with Syracuse, and all of Athens paid the price. In...