Marxism is a theory of history and social change in which is a central concept.

In Marxism, inequality is the Central Concept.
Marxism is based on the perspective that the distribution of wealth in society is extremely unequal.
The main goal of Marxism is to abolish class system and create a society where people could get equal outcomes, and the only way to do that is by creating a Government that controls all economic resources in the society.