Tribalism is as old as humans, and previous successful attempts at “defeating” it have typically involved warring tribes being wholesale eradicated by, or assimilated into, larger tribes, then states, then blocs. Now we have global tribes and nobody bigger left to defeat or assimilate them.

The only way out I see is to try to grow the “sensible majority” into a dominant majority that can robustly eject extremists - make a bigger tribe, essentially. But what cluster of issues unites enough people to form a dominant political force, while also rejecting the dark patterns that consume the current political tribes?