The other one is Marxist Leninism. Marxism is a philosophy by Karl Marx, who wrote books like Das Kapital, that is really like a way of looking at the world. He sees the world through glasses where everything is kind of colored by property and money and ownership. He sees really the future of the world going towards a split, where you have a group of people, the majority, who are the workers. They're called the proletarian. That's the vocab up on the wall. The proletarian are the ones who work and work and work and never get ahead because they don't own what they create.