“There is one, and only one, kind of real internationalism, and that is—working whole-heartedly for the development of the revolutionary movement and the revolutionary struggle in one’s own country, and supporting (by propaganda, sympathy, and material aid) this struggle, this, and only this, line, in every country without exception.”
— Lenin, The Tasks of the Proletariat in Our Revolution, 1917 in Collected Works, Vol. 24, Progress Publishers, 1964.