Marx himself said and wrote little about the future beyond capitalism. He didn’t believe in future-gazing; no one could know how the world would evolve. Marx gave us some ideas of what might have to happen if we were going to get beyond capitalism. But he offered no blueprints or road maps. Later Marxists did not always share these hesitations, especially after Marxists came to play leading roles in what they called “socialist” societies.
Marx never suggested, contrary to what so many have said, that the state — the government — had to play some sort of ongoing, central role in what this future post-capitalist world would look like.