A persuasive way of understanding the collapse of Communism in Europe and the Soviet Union is to think of nineteenth- or twentieth-century slum clear… - Michael Burleigh

It's no coincidence that most terrorists are males aged between 18 and 30. One terrorist from the 1960s recently said, 'we half-read a whole lot of theories that we fully understood' - and the same probably applies to Islamic terrorists today. Few have any background in religion, and most are ignorant of Islam. They've just ingested it as slogans, either from the internet or radical clerics, and attached it to some grievance about the persecution of Muslims in other parts of the world.

Between 1939 and 1945 the Nazis systematically murdered as many as 200,000 mentally ill or physically disabled people whom they stigmatised as 'life unworthy of life'. This covert and complex series of operations was known as the ‘euthanasia programme.’

The National Socialists not only joined the Communists in denouncing Social Democratic bosses, but also practiced egalitarianism, unlike bourgeois parties. One should not underestimate the extent to which working-class people bitterly resented being treated as infantile inferiors by the middle and upper classes.