 The Crito depends upon a notion of justice and injustice which it never defines. In the Republic, by contrast, a dialogue in which Socrates is also the main character (and first-person narrator) but in which the views he advances go beyond the tight-knit pattern of debates in the dialogues discussed in section 3.1, Plato (424/3–348/7  BCE)[7]  offers an account of justice linking the political to the psychological and justice to a higher understanding of true goodness. (See the entry on  Plato.)  The Republic is, with the Laws, an order of magnitude longer than any other Platonic dialogue. Readers today are likely to think of the Republic as the home par excellence of political philosophy. But that view has also been challenged by scholars who see it as primarily an ethical dialogue, driven by the question of why the individual should be just (Annas 1999). This section argues that the ethical and political concerns, and purposes, of the dialogue are inextricably intertwined.