it deconstructs humans themselves. There is no longer an ‘I’: just a swirling mass of emotions, of signifiers, of impulses, meaning that ‘I’ am in a constant state of flux. The moral imperative left over from low-grade existentialism (that one should be true to one’s deepest self) collides with the postmodern claim that one’s deepest self is a fluid, unstable thing: ‘When I play music,’ said the jazz musician Charlie Mingus, ‘I’m playing who I really am; the trouble is that I’m changing all the time.’