Marx’s theory is closely linked with scientific thought insofar as it seeks a rational understanding of the forces that really operate in society. But it ultimately goes beyond scientific thought, preserving it only by superseding it. It seeks to understand struggles, not laws.
Guy Debord, La société du spectacle §81
The only two classes that really correspond to Marx’s theory, the two pure classes that the entire analysis of Capital brings to the fore, are the bourgeoisie and the proletariat. These are also the only two revolutionary classes in history, but operating under different conditions. The bourgeois revolution has been accomplished. The proletarian revolution is a yet-unrealized project, born on the foundation of the earlier revolution but differing from it qualitatively.
Guy Debord, La société du spectacle §88
Yes, Marx’s thought really is a critique of everyday life.
Internationale situationniste #11