Marxism and fascism oppose each other primary because Marxism "called on the workers of the world to unite across national borders in a global battle against their oppressors, treating nation-states and national pride as tools in the arsenal of bourgeois propaganda", while fascism, on the contrary, exalted the interests of the nation or race as the highest good, and rejected all ideas of universal human interests standing above the nation or race. Within the nation, Marxism calls for class struggle by the working class against the ruling class, while fascism calls for collaboration between the classes to achieve national rejuvenation. Fascism proposes a type of society in which different classes continue to exist, but the rich and poor both serve the national interest and do not oppose each other.