Here is a Planet Money podcast very much worth hearing  Why People Do Bad Things I have always been fascinated by stories about people who get involved in serious wrongdoing almost by accident. This piece has psychologists explaining how, one teensy little step at a time, we go about convincing ourselves that what we are doing, while technically totally wrong, is still OK. A maxim I invented to explain some of the stuff I see at work is that humans have an almost infinite capacity to convince ourselves that what is good for us is Good.