Trotsky's 'ABC of Materialist Dialectics' is a brilliant short explanation of Marxist philosophy. It was written as part of a defence of Marxism against a middle class revisionist tendency in the American Trotskyist movement in the late 1930s, which attempted to challenge its basic principles. As opposed to pragmatism and empiricism, Trotsky defended dialectical materialism as a richer, fuller, more comprehensive view of society and life in general. Originally published 8 December 1939.

We republish Leon Trotsky's 1938 pamphlet, Their Morals and Ours. Written while Trotsky was in exile in Mexico, the pamphlet answers critics of the Russian Revolution, who smeared the Bolsheviks as "amoral". Trotsky argues that morality is not fixed but reflects class interests in society. So-called common sense and "elementary moral precepts" against violence, for example, in reality serve the interests of the ruling class. Revolutionary morality – including the use of violence in class struggle – is determined by whatever advances the cause of the proletariat, and thus the liberation of humanity.