Sidgwick saw egoism as important and undefeated. Not long afterward, egoism is largely ignored. Immediately after Sidgwick, many arguments were given against egoism – most poor – but one argument deserves attention as both influential and plausible. Call it the “grounds objection.” It has two strands. It objects that there are justifying reasons for action other than that an action will maximize my self-interest. It also objects that sometimes, what makes an action right is a fact other than its maximizing (...) my self-interest. I briefly explain and criticize many of the arguments given against egoism in the period, then explain and defend the grounds objection. (shrink)