Workers – men and women – of all countries, place yourselves under the banner of the Fourth International. It is the banner of your approaching victory!

[Vladimir] Lenin died in January, 1924; three months later [Joseph] Stalin expounded in writing Lenin's conception of the proletarian revolution.

The struggle against war and its social source, capitalism, presupposes direct, active, unequivocal support to the oppressed colonial peoples in their struggles and wars against imperialism. A 'neutral' position is tantamount to support of imperialism.

If we had more time for discussion we should probably have made a great many more mistakes.

The theory of the permanent revolution, in contradiction to the theory of socialism in one country, was recognized by the entire Bolshevik party during the period from 1917 to 1923.

Workers – men and women – of all countries, place yourselves under the banner of the Fourth International. It is the banner of your approaching victory!

Simultaneously the Left Opposition in the course of several years carried on a struggle against the Stalinists in favor of collectivization.