I have a question about the Effective Altruism community that's always bothered me. Why does the movement not seem to have much overlap with the frugality/early retirement movement? Is it just that I haven't seen it? I read a number of sites (My favorite being Mr Money Mustache, who retired at age 30 on a modest engineer's salary) that focus on early retirement through (many would say extreme) frugality. I wouldn't expect that this, or something close to it, would be hard for most people in the demographic of this site. It seems to me that the two movements have a lot in common, mainly attempting to get people to be more responsible with their money. If you take as an axiom that, for members of the EA movement, marginal income/savings equals increased donations, it seems as though there is tremendous opportunity for synergies between the two.