Today everyone knows that inequality is wrong. A century ago everyone knew that gay sex was wrong. The intuitions people have on moral questions are intensely felt. They are also shallow and transient to the last degree.... Justice is an artefact of custom. Where customs are unsettled its dictates soon become dated. Ideas of justice are as timeless as fashion in hats.

The Vices of Morality: Justice and Fashion (p. 102-3) - Straw Dogs: Thoughts on Humans and Other Animals (2002)