The common elements of fascism — extreme nationalism, social Darwinism, the leadership principle, elitism, anti-liberalism, anti-egalitarianism, anti-democracy, intolerance, glorification of war, the supremacy of the state and anti-intellectualism — together form a rather loose doctrine. Fascism emphasises action rather than theory, and fascist theoretical writings are always weak. Hitler's Nazism had rather more theory, though its intellectual quality is appalling. This greater theoretical content is mostly concerned with race, and it was Hitler's racial theories that distinguished Nazism from Italian fascism.