This document provides an overview of Marxism by discussing capitalism, socialism, and communism. It defines capitalism as an economic system where private owners control trade and industry for profit, noting consequences like income inequality and pollution. Socialism is described as a system where the population collectively owns production and wealth is distributed more equally. Finally, communism is defined as a political system with complete government control over a collectively owned economy with no private property and where people work and share resources based on their abilities and needs.