Abstract
IN A PRESIDENTIAL ADDRESS I believe the speaker is allowed more latitude than in a more ordinary speech. There is more freedom to explore and perhaps even preach. So I am going to do a bit of both. My chapter and verse, some of you will be surprised to know, is a passage from the preface to Foucault’s The Order of Things, in which he argues that categories are a matter of invention. This text has had enormous impact on the issue I wish to address today, and in many ways has helped to define it and to establish as definitive, in the minds of many of our contemporaries, the view that categories are invented.