Socrates’ claim that he is engaged in a cooperative inquiry (506e3-5) may surprise readers of the dialogue. In particular, some readers take Callicles to be a hostile interlocutor; his views about philosophy, ethics, and politics seem to be designed to give us a vivid picture of everything that Socrates rejects and of the whole outlook that vehemently rejects Socrates. Socrates, however, attributes the success of his argument to cooperation between himself and Callicles; he implies that Callicles fulfils the promise that Socrates saw in him when he described him as the ideal interlocutor. Evidence drawn from Thucydides shows that Callicles holds the views of an enlightened (in his view) Periclean supporter of democracy. Socrates exposes a conflict between the acceptance of hedonism and the recognition of non-instrumental goods that belong to this Periclean outlook. Hedonism is fairly attributed to Callicles, and Callicles acknowledges it. Since Callicles is willing to make the effort to ‘view himself correctly’, he recognizes the fairness of Socrates’ argument, and accepts its consequences. Despite appearances, he participates in the cooperative inquiry that leads to Socrates’ conclusion.