Camryn Taylor

This essay explores the treatment of the relation between nature (phusis) and norm or convention (nomos) in Democritus and in certain Platonic dialogues. In his physical theory Democritus draws a sharp contrast between the real nature of things and their representation via human conventions, but in his political and ethical theory he maintains that moral conventions are grounded in the reality of human nature. Plato builds on that insight in the account of the nature of morality in the myth in the Protagoras. That provides material for a defense of morality against the attacks by Callicles in the Gorgias and Thrasymachus and Glaucon in the Republic, all of whom seek to use the nature-convention contrast to devalue morality.

Davidson poses the problem via three propositions p1-P3, Each persuasive but apparently inconsistent. His solution, That the three are consistent, Merely re-Phrases the problem. We should rather reject p2; if an agent judges that it would be better to do "x" than to do "y", Then he wants to do "x" more than he wants to do "y". Plato accepts p2 because he thinks all agents predominantly self-Interested, And hare because he thinks that evaluative judgments imply desires; both are criticized. An alternative to p2, Consistent with p1 and p3, Makes a subtler connection between judgment, Desire and behaviour