reddit community called Change My View ... a ready-made natural experiment ... feed it into programs ... to understand the back-and-forth between human beings ... discovered two things: what kind of arguments are most likely to change people’s minds, and what kinds of minds are most likely to be changed. https://www.reddit.com/r/changemyview/ : po…

there’s plenty of reasons why negativity abounds online... Incivility is a basic human instinct that’s encouraged by anonymity and exacerbated by inequality... anger helps drive participation... anyone who benefits from trolling — whether it’s platforms themselves or populist politicians — have little reason to improve the tone of online chatting…

Study shows political discussions are ruining Facebook and friendships... users who try to talk about politics on Facebook are often surprised by the political opinions of their acquaintances... a diverse set of opinions among a user's friends makes everyone want to speak up less...Facebook has a low threshold for “friending” ... can bridge togeth…