Thanks for all the recommendations! Generally, I have a sense that there are all kinds of really cool niche intellectual communities on the internet, and Reddit might be a good place to find some. I guess what I most want is "things that could/should be rationalist adjacent, but aren't", not that that's very helpful. So the obvious options are r/rational, r/litrpg, ... That being the case, these seem like the most relevant para from your recs: [...] ... I'm probably not going to be very serious about reddit; I've tried before and not stuck with it. But finding things that aren't just inane could be a big help. This sounds like a really useful filter: [...]