[Philip Zimbardo’s] observations belie the standard explanation offered by business leaders when people in their organizations are caught misbehaving: Hey, there are a few bad apples in any barrel. Zimbardo argues that, in fact, ethical problems in organizations originate with the “barrel makers” — the leaders who, wittingly or not, create and maintain the systems within which participants are encouraged to do wrong. Hence, instead of companies wasting millions of dollars on ethics courses designed to exhort employees to “be good,” it would be far more effective for managers to make an effort to create corporate cultures that reward people for doing the right thing all of the time.