A tribe is people, an idea, and someone who takes the first step
Notice the difference between a crowd and a tribe. A crowd is people standing in the same place, waiting for the game to start. A tribe is that same group after someone leads the battle cry and gets everyone to recognize themselves as part of the same thing. A tribe, in the sense the book uses, is people connected to each other, connected to a shared idea, and connected to someone willing to point the way.
The difference between an audience and a tribe shows up in interaction. A channel with lots of followers may have no tribe at all if nobody comments and nobody seeks each other out beyond it. But a neighborhood group of a few dozen people who know each other by name and trade favors without charging a thing, that's a full tribe, even if it's small.
The book's central bet is that leading a tribe has become the most valuable work there is, precisely because you can't buy it with an ad or create it by decree. It's born when someone offers people something to believe in together, and takes on the responsibility of keeping that thread pulled tight.
