One of the greatest and most joyful challenges of adult life is to develop skills that make the people around us better off with us than without us. Integrity is a key part of that challenge. We are social animals, aiming not simply to trade but to make a place for ourselves in a community. You don’t want to have to pretend that you feel proud of fooling your customers into believing you could be trusted.The ethical question is: how do people have to live in order to make the world...