Memes

Capitalism doesn't just collapse, it prepares the conditions for its own overthrow. You can have a successful revolution without the entire collapse of society. In the era of imperialism, for example, we see export of the contradictions of the global north to the global south, which is why no revolution has happened in the global north despite Marx's predictions.

1. What I remember from Marx and/or Engels is that a sharpening of capitalism’s internal contradictions are necessary but not sufficient. Revolution is still needed. We can’t expect some automatic transition from capitalism to socialism.
2. Marx wasn’t a prophet. The first successful communist revolution happened in Russia under feudalism, not capitalism.

It's not a passive process and the arising of socialism isn't guaranteed.