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A revelatory, paradigm-shifting work from a renowned Columbia professor and “one of the great social and cultural psychologists” (Amy Cuddy) that demystifies our tribal instincts and shows us how to use them to create positive change.

Tribalism is our most misunderstood buzzword. We’ve all heard pundits bemoan its rise, and it’s been blamed for everything from political polarization to workplace discrimination. But as acclaimed cultural psychologist and Columbia professor Michael Morris argues, our tribal instincts are humanity’s secret weapon.

Ours is the only species that lives in tribes: groups glued together by their distinctive cultures that can grow to a scale far beyond clans and bands. Morris argues that our psychology is wired by evolution in three distinctive ways. First, the peer instinct to conform to what most people do. Second, the hero instinct to give to the group and emulate the most respected. And third, the ancestor instinct to follow the ways of prior generations. These tribal instincts enable us to share knowledge and goals and work as a team to transmit the accumulated pool of cultural knowledge onward to the next generation.

Countries, churches, political parties, and companies are tribes, and tribal instincts explain our loyalties to them and the hidden ways that they affect our thoughts, actions, and identities. Rather than deriding tribal impulses for their irrationality, we can recognize them as powerful levers that elevate performance, heal rifts, and set off shockwaves of cultural change.