Who said "The proletariat alone are a revolutionary class."?

This quote is attributed to Marx, Karl.

The proletariat alone are a revolutionary class. - Marx, Karl

"The proletariat alone are a revolutionary class."

Marx, Karl Power

Philosopher-Economist German 1818–1883

"The philosophers have only interpreted the world in various ways; the point is to change it."

"Religion is the opium of the people."

"All that is solid melts into air."

"The more the worker produces, the less he has to consume."

"Power without control is just destruction."

"Power is not about control, it's about influence"

"The world doesn't need me to be the hero. It just needs me to be dangerous."

"The claws come out when I need them to."