 If we are justified in taking Socrates’ speech in Plato’s Apology to constitute reliable evidence about what the historical Socrates was like, then whatever we find in Plato’s other works that is of a piece with that speech can also be safely attributed to Socrates. So understood, Socrates was a moralist but (unlike Plato) not a metaphysician or epistemologist or cosmologist. That fits with Aristotle’s testimony, and Plato’s way of choosing the dominant speaker of his dialogues gives further support to this way of distinguishing between him and Socrates. The number of dialogues that are dominated by a Socrates who is spinning out elaborate philosophical doctrines is remarkably small: Phaedo, Republic, Phaedrus, and Philebus. All of them are dominated by ethical issues: whether to fear death, whether to be just, whom to love, the place of pleasure. Evidently, Plato thinks that it is appropriate to make Socrates the major speaker in a dialogue that is filled with positive content only when the topics explored in that work primarily have to do with the ethical life of the individual. (The political aspects of Republic are explicitly said to serve the larger question whether any individual, no matter what his circumstances, should be just.) When the doctrines he wishes to present systematically become primarily metaphysical, he turns to a visitor from Elea (Sophist, Statesman); when they become cosmological, he turns to Timaeus; when they become constitutional, he turns, in Laws, to a visitor from Athens (and he then eliminates Socrates entirely). In effect, Plato is showing us: although he owes a great deal to the ethical insights of Socrates, as well as to his method of puncturing the intellectual pretensions of his interlocutors by leading them into contradiction, he thinks he should not put into the mouth of his teacher too elaborate an exploration of ontological, or cosmological, or political themes, because Socrates refrained from entering these domains. This may be part of the explanation why he has Socrates put into the mouth of the personified Laws of Athens the theory advanced in Crito, which reaches the conclusion that it would be unjust for him to escape from prison. Perhaps Plato is indicating, at the point where these speakers enter the dialogue, that none of what is said here is in any way derived from or inspired by the conversation of Socrates.