Without the presence of class warfare, trade unions would be hard put to justfy their existence.
Karl MarxIn the national struggles of the proletarians of the different countries, they point out and bring to the front the common interest of the entire proletariat, independently of all nationality.
Karl MarxFrom the outset, the Christian was the theorizing Jew, the Jew is therefore the practical Christian, and the practical Christian has become a Jew again.
Karl Marx