This lecture presents the text of the speech about the genealogy of the modern state delivered by the author at the 2008 British Academy Lecture. It explains that to investigate the genealogy of the state is to discover that there has never been any agreed concept to which the word state has answered. The lecture suggests that any moral or political term that has become so deeply enmeshed in so many ideological disputes over such a long period of time is (...) bound to resist any efforts at definition. (shrink)