If you grow up in a WEIRD society, you become so well educated in the ethic of autonomy that you can detect oppression and inequality even where the … - Jonathan Haidt

We should not expect individuals to produce good, open-minded, truth-seeking reasoning, particularly when self-interest or reputational concerns are in play. But if you put individuals together in the right way, such that some individuals can use their reasoning powers to disconfirm the claims of others, and all individuals feel some common bond or shared fate that allows them to interact civilly, you can create a group that ends up producing good reasoning as an emergent property of the social system. This is why it's so important to have intellectual and ideological diversity within any group or institution whose goal is to find truth (such as an intelligence agency or a community of scientists) or to produce good public policy (such as a legislature or advisory board).

This is an essential part of our story. Americans now bear such animosity toward one another that it’s almost as if many are holding up signs saying, “Please tell me something horrible about the other side, I’ll believe anything!” Americans are now easily exploitable, and a large network of profit-driven media sites, political entrepreneurs, and foreign intelligence agencies are taking advantage of this vulnerability.

Increase similarity, not diversity. To make a human hive, you want to make everyone feel like a family. So don’t call attention to racial and ethnic differences; make them less relevant by ramping up similarity and celebrating the group’s shared values and common identity.49 A great deal of research in social psychology shows that people are warmer and more trusting toward people who look like them, dress like them, talk like them, or even just share their first name or birthday.50 There’s nothing special about race. You can make people care less about race by drowning race differences in a sea of similarities, shared goals, and mutual interdependencies.51