He specifically mentions that it will occur in the richest most developed and technologically advanced country in the world.

It was one of the criticisms of China and Russia, they tried to create communism without a large base of workers, map actually created his own theories based on farmers.

That being said, his writings haven't aged well at all, reading it with a modern lens you can see how aged it is.

"Once the working class realizes it's being exploited"

But the revolution he predicted came, and it turned out way different than he expected (the russian revolution)