The Soviet Union needs thinking and critical friends, such as are capable not only of singing hymns in the hours of success, but of not shrinking in the hour of defeat and danger.
Leon TrotskyAll the parties of capitalist society, all its moralists and all its sycophants will perish beneath the debris of the impending catastrophe. The only party that will survive is the party of the world socialist revolution.
Leon TrotskyOnce again, he who ignores the problems of revolutionary strategy would do better not to talk about revolutions at all.
Leon TrotskySimultaneously the Left Opposition in the course of several years carried on a struggle against the Stalinists in favor of collectivization.
Leon Trotsky