I am opposing it with an idea of the history of philosophy as a history of philosophers, that is, a history of mortal, fragile and limited creatures like you and I. I am against the idea of clean, clearly distinct epochs in the history of philosophy or indeed in anything else. I think that history is always messy, contingent, plural and material. I am against the constant revenge of idealism in how we think about history.

When the animal becomes human, the effect is pleasingly benign and we laugh outloud, "Okay come clean now. This isn't really about hunting, is it?" But when the human becomes animal, the effect is disgusting, and if we laugh at all, then it is what Beckett calls the "mirthless laugh", which laughs at that which is unhappy.

Melancholia for Freud is the relationship that the subject takes up with respect to itself from the position of what he calls conscience or what he later calls the super-ego. And that can be lacerated - if you think of the anorexic who sees themselves from the perspective of the image they have, of the image they have of themselves in the mirror which is false - that would be the super-ego. Super-ego is what generates depression and it is what has to be dealt with in psychoanalysis.

Philosophy isn't programmed into us, and a lot of the forces of our culture steadfastly work against it. Philosophy, for me, is a way of resisting the nihilism of the present by making, creating, affirming. By going on.

The other side of my work is political disappointment - the realization that we are living in an unjust world. "Blood is being spilled in the merriest way, as if it was champagne," Dostoevsky says. That raises the problem of justice, what it might mean in an unjust world and whether there can be an ethics and a political practice that would be able to face and face down the injustice of the present. How might we begin to think about that?

There are lots of stories about how philosophy begins. Some people claim it begins in wonder; some people claim it begins in worry. I claim it begins in disappointment.

I've always been very keen on Pascal, and what I'm most keen on in Pascal is his emphasis upon human wretchedness. He has a phrase which goes something like 'Anxiety, boredom and inconstancy, that is the human condition' and I've always been very partial to that.