In 1842 Henrich Heine, the German poet, wrote that the bourgeoisie, 'obsessed by a nightmare apprehension of disaster' and 'an instinctive dread of communism', were driven against their better instincts into tolerating absolutist government. Theirs was a 'politics motivated by fear'. Over the next 150 years, the middle classes were repeatedly accused of betraying liberty for fear of 'red revolution'. The failure of the revolutions of 1848, conservative nationalism from the 1860s, fascist victories in the first half of the twentieth-century, and repression of national liberation movements...