Socialists (including communists) and anarchists splited from their union it the first International, because they disagreed on how to proceed after the revolution (with or without a State). But they were in the first International for the same aim.
(And soc-dem too, separation between them and communists is what splits the second International. soc-dem leaders are often disguised liberals, but soc-dem workers are often genuine socialists).
Communism and anarchism do not share the same aim. The only thing they have in common is that both are revolutionary.
Socialists (including communists) and anarchists splited from their union it the first International, because they disagreed on how to proceed after the revolution (with or without a State). But they were in the first International for the same aim.
(And soc-dem too, separation between them and communists is what splits the second International. soc-dem leaders are often disguised liberals, but soc-dem workers are often genuine socialists).