In the past, the left debated the future. Now it debates identity. The de-alignment of class politics into a mush of interest group politics has left the left without a voice. You cannot square anti-nuclear greens with those who believe in industry and the right of citizens to press a switch and get light, heat and power. You cannot square the Muslim-hating right or those who preach "Dutch jobs for Dutch people" with any of the anti-racist liberal traditions that the European left painfully acquired in recent generations.