Theorists and gurus like to make a pattern: people are all selfish; people are only influenced by class interests; people hate their parents; people can be conditioned; men are aggressive; women are gentle; people cannot help themselves, and so on. But this is not so much a matter of following the evidence, as of imposing an interpretation on it. Like all stereotypes, such interpretations can be dangerous, for people can be caused to conform to them,
