We do not use the terms ‘normal’ or ‘abnormal’. All societies are rational and irrational at the same time. They are perforce rational in their mechanisms, their cogs and wheels, their connecting systems, and even by the place they assign to the irrational. Yet all this presupposes codes or axioms which are not the products of chance, but which are not intrinsically rational either. It’s like theology: everything about it is rational if you accept sin, immaculate conception, incarnation. Reason is always a region cut out of the irrational — not sheltered from the irrational at all, but a region traversed by the irrational and defined only by a certain type of relation between irrational factors. Underneath all reason lies delirium, drift. Everything is rational in capitalism, except capital or capitalism itself. The stock market is certainly rational; one can understand it, study it, the capitalists know how to use it, and yet it is completely delirious, it’s mad. It is in this sense that we say: the rational is always the rationality of an irrational. Something that hasn’t been adequately discussed about Marx’s Capital is the extent to which he is fascinated by capitalists mechanisms, precisely because the system is demented, yet works very well at the same time. So what is rational in a society? It is — the interests being defined in the framework of this society — the way people pursue those interests, their realisation. But down below, there are desires, investments of desire that cannot be confused with the investments of interest, and on which interests depend in their determination and distribution: an enormous flux, all kinds of libidinal-unconscious flows that make up the delirium of this society. The true story is the history of desire.