One of the appeals of markets, as a public philosophy, is they seem to spare us the need to engage in public arguments about the meaning of goods. So markets seem to enable us to be non-judgmental about values. But I think that's a mistake.

My main quarrel with liberalism is not that liberalism places great emphasis on individual rights - I believe rights are very important and need to be respected. The issue is whether it is possible to define and justify our rights without taking a stand on the moral and even sometimes religious convictions that citizens bring to public life.

Democracy does not require perfect equality, but it does require that citizens share a common life. What matters is that people of different backgrounds and social positions encounter one another, and bump up against one another, in the course of ordinary life.

Whether you're a libertarian liberal or a more egalitarian liberal, the idea is that justice means being non-judgmental with respect to the preferences people bring to public life.