What persuades men and women to mistake each other from time to time for gods or vermin is ideology. One can understand well enough how human beings may struggle and murder for good material reasons - reasons connected, for instance, with their physical survival. It is much harder to grasp how they may come to do so in the name of something as apparently abstract as ideas. Yet ideas are what men and women live by, and will occasionally die for.

Rousseau ranks among the great educational theorists of the modern era, even if he was the last man to put in charge of a classroom. Young adults, he thought, should be allowed to develop their capabilities in their distinctive way.

If it is true that we need a degree of certainty to get by, it is also true that too much of the stuff can be lethal.

One side-effect of the so-called war on terror has been a crisis of liberalism. This is not only a question of alarmingly illiberal legislation, but a more general problem of how the liberal state deals with its anti-liberal enemies.

We face a conflict between civilisation and culture, which used to be on the same side. Civilisation means rational reflection, material wellbeing, individual autonomy and ironic self-doubt; culture means a form of life that is customary, collective, passionate, spontaneous, unreflective and arational.

As far as belief goes, postmodernism prefers to travel light: it has beliefs, to be sure, but it does not have faith

The humanities should constitute the core of any university worth the name.