Online research in philosophy

Although it is a commonplace that the Protagoras and the Republic present diffent views of akrasia, the nature of the difference is not well understood. I argue that the logic of the famous argument in the Protagoras turns just on two crucial assumptions: that desiring is having evaluative beliefs (or that valuing is desiring), and that no one can have contradictory preferences at the same time; hedonism is not essential to the logic of the argument. And the logic of the argument for the division of the soul in the Republic requires the rejection of just the second of these assumptions, but not the evaluative conception of desire. I also maintain that Plato was aware, at the time of composition, of these features of the argumentation of his dialogues. Finally, I argue that there is reason to think that, even at the time of the Protagoras, Plato held the conception of the soul expressed in the Republic, and not anything like that expressed in the famous argument of the Protagoras. The Protagoras view, even without hedonism, is a poor expression of the thesis that virtue is knowledge.

The Protagoras is one of Plato's most entertaining dialogues. It represents Socrates at a gathering of the most celebrated and highest-earning intellectuals of the day, among them the sophist Protagoras. In flamboyant displays of both rhetoric and dialectic, Socrates and Protagoras try to out-argue one another. Their arguments range widely, from political theory to literary criticism, from education to the nature of cowardice; but in view throughout this literary and philosophical masterpiece are the questions of what part knowledge plays in a successful life, and how we may acquire the knowledge that makes for success. This edition contains the first commentary in English on the Greek text for almost a hundred years. The commentary provides the assistance with linguistic, literary and philosophical detail that will enable students and scholars to savour to the full the pleasures of the Protagoras.