Socialism: Socialism is a kind of social, political, philosophy and economy system. Which the means of production (which is “resources”) were owned by the whole society.
Communism: It’s a social and political idea, which was aimed to establish a Communist society. In that society, the means of production were owned by the whole society. In the idea of Communism, there’s no conception of Nation and social classes.
Fascism: It’s a concept that advocated proper violence. Fascism against liberty, Individualism and Socialism.
Nazism: It’s the combination of several