Title: Couple of my favorites:<p>* https:&#x2F;&#x2F;reddit.com&#x2F;r&#x2F;AskHistorians - All things history. Quality of discussions are way better than on most other subreddits. Highly moderated<p>* https:&#x2F;&#x2F;discuss.bootstrapped.fm - bootstrapped businesses<p>* https:&#x2F;&#x2F;lobste.rs - kinda like HN but for tech only<p>* https:&#x2F;&#x2F;slatestarcodex.com - it is more blog than a community, but great nevertheless<p>I used to frequent other communties but these are the ones that stood the test of time
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