Proletarian internationalism

Proletarian internationalism, sometimes referred to as socialist internationalism or international socialism, is the perception of all proletarian revolutions as being part of a single global class struggle rather than separate localized events. It is based on the theory that capitalism is a world-system and therefore the working classes of all nations must act in concert if they are to replace it with communism.

Source: Wikipedia — Proletarian internationalism (CC BY-SA 4.0)