Instead, Professor Kahneman favored an alternative that he termed “adversarial collaboration.” When people who disagree work together to test a hypothesis, they are involved in a common endeavor. They are trying not to win, but to figure out what’s true. They might even become friends.

Everyone belongs to a tribe and underestimates how influential that tribe is on their thinking. There is little correlation between climate change denial and scientific literacy. But there is a strong correlation between climate change denial and political affiliation. That’s an extreme example, but everyone has views persuaded by identity over... See more