What role did class consciousness play in Marxist revolution?

In Marxist theory, class consciousness is the vital process by which members of the working class transition from a group sharing common grievances—a class "in itself"—to a unified social force aware of its collective identity and opposition to the bourgeoisie, becoming a class "for itself."1

This awareness is essential to Marxist revolution because it transforms the proletariat into the "grave diggers" of capitalism. By recognizing their shared exploitation and their historical mission to abolish the class system, workers are empowered to overthrow the ruling class and establish the dictatorship of the proletariat.312

However, the development of this consciousness is not always straightforward. Marxism acknowledges the existence of false consciousness, where workers may hold a distorted understanding of their own interests. This tension led to debates among socialist thinkers: some believed the working class would spontaneously develop revolutionary awareness, while others, such as Lenin, argued that a revolutionary vanguard was necessary to enlighten the proletariat and guide them toward their historical goal. Ultimately, class consciousness serves as the subjective bridge between objective economic conditions and the practical realization of a classless society.12