Both Green politics and religious socialism are not mutually exclusive with other left points of view.
The political slogan "Workers of the world, unite!" is one of the rallying cries from The Communist Manifesto (1848) by Karl Marx and Friedrich Engels (The German original was: "Proletarier aller Länder vereinigt Euch!", literally: " Proletarians of all countries, unite!", but i was soon popularsed in English as "Workers of the world, unite! You have nothing to lose but your chains!").
- "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. WORKING MEN OF ALL COUNTRIES, UNITE!".
This translation is the authorised translation by Marx and Engels and is the most commonly used version in English. A variation of this phrase ("Workers of all lands, unite") is also inscribed on Marx's tombstone. The essence of the slogan is that members of the working classes throughout the world should cooperate to defeat capitalism with proletarian internationalism and achieve victory in the global class conflict.