I've written extensive explanations about this: https://hn.algolia.com/?dateRange=all&page=0&prefix=false&qu.... If anyone reads those and has a question that isn't answered yet, I'd like to know what it is. Some good threads to start with might be https://news.ycombinator.com/item?id=21607844 and https://news.ycombinator.com/item?id=22902396. Also https://news.ycombinator.com/item?id=17014869, which shows how far back political discussion goes on HN, as well as the argument about politics on HN.