1
" In this chapter, we’ve considered six psychological tendencies that exacerbate intertribal conflict. First, human tribes are tribalistic, favoring Us over Them. Second, tribes have genuine disagreements about how societies should be organized, emphasizing, to different extents, the rights of individuals versus the greater good of the group. Tribal values also differ along other dimensions, such as the role of honor in prescribing responses to threats. Third, tribes have distinctive moral commitments, typically religious ones, whereby moral authority is vested in local individuals, texts, traditions, and deities that other groups don’t recognize as authoritative. Fourth, tribes, like the individuals within them, are prone to biased fairness, allowing group-level self-interest to distort their sense of justice. Fifth, tribal beliefs are easily biased. Biased beliefs arise from simple self-interest, but also from more complex social dynamics. Once a belief becomes a cultural identity badge, it can perpetuate itself, even as it undermines the tribe’s interests. Finally, the way we process information about social events can cause us to underestimate the harm we cause others, leading to the escalation of conflict. "
― , Moral Tribes: Emotion, Reason, and the Gap Between Us and Them
4
" After Darwin, human morality became a scientific mystery. Natural selection could explain how intelligent, upright, linguistic, not so hairy, bipedal primates could evolve, but where did our morals come from? Darwin himself was absorbed by this question. Natural selection, it was thought, promotes ruthless self-interest. Individuals who grab up all the resources and destroy the competition will survive better, reproduce more often, and thus populate the world with their ruthlessly selfish offspring. How, then, could morality evolve in a world that Tennyson famously described as “red in tooth and claw”? We now have an answer. Morality evolved as a solution to the problem of cooperation, as a way of averting the Tragedy of the Commons: Morality is a set of psychological adaptations that allow otherwise selfish individuals to reap the benefits of cooperation. "
― , Moral Tribes: Emotion, Reason, and the Gap Between Us and Them
16
" Evolution is an inherently competitive process: The faster lion catches more prey than other lions, produces more offspring than other lions, and thus raises the proportion of fast lions in the next generation. This couldn’t happen if there were no competition for resources. If lion food existed in unlimited supply, the faster lions would have no advantage over the slower ones, and the next generation of lions would be, on average, no faster than the last generation. No competition, no evolution by natural selection. "
― , Moral Tribes: Emotion, Reason, and the Gap Between Us and Them