Communalism versus individualism.
It may sound vague, but it is the difference between Effective Altruists and people like me whose response to EA is basically, "Well, that's better than what you had before, good luck with that." Which is to say, I harbor no animosity towards EA, I just see no point in participating, because it starts from an axiom, or perhaps set of axioms, I don't share.
Which isn't to say I haven't donated money to causes, but rather that I donate money to causes which I think will make my life better. I have some kind of interest in AI risk, for a Less-Wrong appropriate example, but little to no interest in malaria in third-world nations.
Yesterday at our LW Berlin Dojo we talked about areas where we disagree. We got 4 issues:
1) AI risk is important
2) Everybody should be vegan.
3) It's good to make being an aspiring rationalist part of your identity.
4) Being conscious of privacy is important
Can you think of other meaningful issues where you think our community disagrees? At best issues that actually matter for our day to day decisions?