“Studies show that, in general, people who feel good, do good – and likewise, people who do good, feel better. The rich are no exception. Giving to charity activates parts of the brain related to reward and pleasure. Yes, the rich do have some distinctive reasons for giving to charity, such as the desire not to ‘morally corrupt’ their heirs. But like others, they also give to strengthen their identity – and probably, to relieve their guilt.”