  Although this is all that the city-person analogy needs to do, Socrates seems at times to claim more for it, and one of the abiding puzzles about the Republic concerns the exact nature and grounds for the full analogy that Socrates claims. At times Socrates seems to say that the same account of justice must apply to both persons and cities because the same account of any predicate ‘F’ must apply to all things that are F (e.g., 434d–435a). At other times Socrates seems to say that the same account of justice must apply in both cases because the F-ness of a whole is due to the F-ness of its parts (e.g., 435d–436a). Again, at times Socrates seems to say that these grounds are strong enough to permit a deductive inference: if a city’s F-ness is such-and-such, then a person’s F-ness must be such-and-such (e.g., 441c). At other times, Socrates would prefer to use the F-ness of the city as a heuristic for locating F-ness in persons (e.g., 368e–369a). Plato is surely right to think that there is some interesting and non-accidental relation between the structural features and values of society and the psychological features and values of persons, but there is much controversy about whether this relation really is strong enough to sustain all of the claims that Socrates makes for it in the Republic (Williams 1973, Lear 1992, Smith 1999, Ferrari 2003).