One of the most prominent strands in contemporary work on the virtues consists in the attempt to develop a distinctive-and compelling-account of practical reason on the basis of Aristotle's ethics. In response to this project, several eminent critics have argued that the Aristotelian account encourages a dismissive attitude toward moral disagreement. Given the importance of developing a mature response to disagreement, the criticism is devastating if true. I examine this line of criticism closely, first elucidating the features of the Aristotelian account that motivate it, and then identifying two further features of the account that the criticism overlooks. These further features show the criticism to be entirely unwarranted. Once these features are acknowledged, a more promising line of criticism suggests itself-namely, that the Aristotelian account does too little to help us to resolve disputes-but that line of objection will have to be carried out on quite different grounds.The way in which we understand a given kind of disagreement, and explain it, has important practical effects. It can modify our attitude to others and our understanding of our own outlook. In relation to other people, we need a view of what is to be opposed, rejected, and so forth, and in what spirit; for ourselves, disagreement can raise a warning that we may be wrong, and if truth or correctness is what we are after, we may need to reform our strategies (Williams 1985, p 133).