Earlier quoted context omitted.
"Would something decentralized help?" Not directly; I'm increasingly thinking centralization is not the problem. The problem is size. The intersection of "things that everyone agrees are acceptable" goes to zero as the size of the community increases, and while communities have strong selection effects that prevent them from being anything like "a uniformly random selection of people slammed together", regression to…
I would put it as "the problem is society" essentially as opposed to size per se. I personally doubt that what is essentially a forcibly sharded technical approach akin to what MMOs did to deal with larger loads and content saturation would be useful. Content depends upon O(n) users subdividing it would reduce the utility and make it lose out and worse breed a new tribalism. Combine that with side channels and I am s…
Also, don't forget that you don't belong to one community; it's not like you log in one day and get assigned to your immutable chunk of the internet. You wander around the read versions of various communities, pick a couple of communities you invest it, pick several more to half-follow, get tired of the abuse in one and switch to another, meet someone in real life who encourages you to join another community, and so on.
Basically, the sort of "tribalism" that you'd encounter is whatever "tribalism" you associate with HN, because the structure I describe already half-exists, scrounging around the remnants from reddit and Facebook in tens of thousands of forums and active blogs and other such things. I don't think it produces any more or less "tribalism" than you get from anything else.