Adam Smith made a persuasive case that moral sentiments are the foundation of ethical behaviors in his 1759 The Theory of Moral Sentiments. This view is still controversial as philosophers debate the extent of human morality. One type of moral behavior, assisting a stranger, has been shown by...

The traditional view in economics is that individuals respond to incentives, but absent strong incentives to the contrary selfishness prevails. Moreover, this "greed is good" approach is deemed "rational" behavior. Nevertheless, in daily interactions and in numerous laboratory studies, a high...