What you’re describing is polarization within a community transforming it into an echo chamber, driving out much of the community. Sure, truechildfree formed out of people who still wanted a community based around that aspect of themselves, but they’re not the reason for the split - they’re a symptom. For every user that made the journey to truechildfree, there’s probably 3-10 that just unsubbed, and another 5 that just stopped participating

My personal example is AITA. It started off as a group judgement based on the morality of the situation, but in the last few years people have become obsessed with “rights”. I actually got tempbanned for a situation where a douche told a woman that by joining trivia night in a small town bar she was ruining guys night. I responded to someone saying “IDK why your bf wasn’t happy about how you handled it”, and I basically said “yeah, he’s the asshole, but clearly this is extremely important to him, and saying screw you I have every right to be here while he storms out didn’t just ruin his night, it soured the evening for his friends who tried to stop him. That’s not going to make you any friends in your new town, and a little compassion could’ve diffused the situation”. It’s hard to put into words (and that’s just the most salient example, I probably got more negative karma there than everywhere else put together), but the community moved from what’s the right thing to do into what’s your legal rights

As far as I know, there’s no trueAITA - the community just morphed into something I find toxic. The nuance was gone, and it became something very different to the sub I loved participating in. I almost unsubbed, but instead I mostly just would start writing a comment before deleting it and moving on.

I think fractured, smaller communities help with this more than anything. Humans generally adjust their morality based on their peers - and the bigger the community, the more the loudest voices begin to feel like they’re expressing the opinion of the majority.

If 10% of a large community upvotes a certain viewpoint, it takes all of the top slots. It’s a weakness of the popularity-based ranking system - a relatively small voting block easily dominates the discussion. The moderates just ignore it, because they disagree but not enough to actually fight it out

But force people together in a smaller, more diverse group, and they moderate each other. The trick is, you can’t do it through polarization - you can’t fragment a community based on beliefs or you get echo chambers.

You just have to throw people together and make them talk it out. Opinions naturally balance towards the mean when the groups are smaller, and the most cohesive voices dominate when the group becomes large