Marx’s support for the Paris Commune destroyed the First International

Evidence

In 1871 Marx was opposed to an attempt at a proletarian revolution in Paris. But when it was made, his loyalty to the working class and his own past record left him no choice but to give it his unflinching support. By identifying the International with the Commune, Marx occasioned the break with the majority of English labour leaders and sealed the fate of the I.W.M.A., a course of action from which there was no honourable release… . Marx and the English trade union leaders disowned each other. — Cedric J. Robinson, Black Marxism_ The Making of the Black…, 240