I suggest that Sidgwick, in his controversial “distinction passage,” has Schopenhauer in mind as someone who denies egoism on the ground that there are no separate individuals. I then reconstruct Sidgwick's argument in the passage. I take him to be defending a presupposition of the case for choosing egoism over utilitarianism. He is claiming that there are separate individuals. I close by rejecting alternative interpretations, on which Sidgwick is arguing directly for egoism.