Workers of the world, unite!

The phrase "workers of all lands unite" on Karl Marx's tombstone.

Workers of the world, unite!, also known by other variations such as proletarians of all countries, unite!, is a revolutionary socialist slogan and rallying cry which calls for proletarian internationalism of the workers throughout the world.

The phrase is notable for appearing as the concluding words of the Manifesto of the Communist Party (1848).

The Communists disdain to conceal their views and aims. They openly declare that their ends can be attained only by the forcible overthrow of all existing social conditions. Let the ruling classes tremble at a Communistic revolution. The proletarians have nothing to lose but their chains. They have a world to win.

Workers of the world, unite!

See also

• Proletarian internationalism
• First International