The Eighteenth Brumaire of Louis Bonaparte

A very important application of Marx's materialist conception of history. Despite highlighting economic, polilitical, etc. struggles going on in France, Marx is careful to never be overtly deterministic. It also offers a (still relevant, but short) critique of the state and its tight knit relationship with capitalism, which Marx never got to elaborate upon in detail and which many ‘socialists' countries completely ignored.
“All revolutions perfected this machine instead of breaking it.”