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What exogenous causes are shifting the allocation of moral intuitions away from community, authority, and purity and toward fairness, autonomy, and rationality? One obvious force is geographic and social mobility. People are no longer confined to the small worlds of family, village, and tribe, in which conformity and solidarity are essential to daily life, and ostracism and exile are a form of social death. They can seek their fortunes in other circles, which expose them to alternative worldviews and lead them into a more ecumenical morality, which gravitates to the rights of individuals rather than chauvinistic veneration of the group. By the same token, open societies, where talent, ambition, or luck can dislodge people from the station in which they were born, are less likely to see an Authority Ranking as an inviolable law of nature, and more likely to see it as a historical artifact or a legacy of injustice. When diverse individuals mingle, engage in commerce, and find themselves on professional or social teams that cooperate to attain a superordinate goal, their intuitions of purity can be diluted. One example, mentioned in chapter 7, is the greater tolerance of homosexuality among people who personally know homosexuals. Haidt observes that when one zooms in on an electoral map of the United States, from the coarse division into red and blue states to a finer-grained division into red and blue counties, one finds that the blue counties, representing the regions that voted for the more liberal presidential candidate, cluster along the coasts and major waterways. Before the advent of jet airplanes and interstate highways, these were the places where people and their ideas most easily mixed. That early advantage installed them as hubs of transportation, commerce, media, research, and education, and they continue to be pluralistic—and liberal—zones today. Though American political liberalism is by no means the same as classical liberalism, the two overlap in their weighting of the moral spheres. The micro-geography of liberalism suggests that the moral trend away from community, authority, and purity is indeed an effect of mobility and cosmopolitanism.202
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