Karl Marx believed

Capitalism

An economic system based on private ownership of factories. Production

Karl Marx believed

That all historical change was caused by a series of class struggles between the bourgeoisie (haves) and the proletariat (have nots)

Karl Marx and Friedrich Engels

published The Communist Manifesto

Marx believed that from

The transition from capitalism to socialism is an inevitable part of the development of human society

Socialism

a political and economic theory of social organization that advocates that the means of production, distribution, and exchange should be owned or regulated by the community as a whole

Communism

a political theory derived from Karl Marx, advocating class war and leading to a society in which all property is publicly owned and each person works and is paid according to their abilities and needs

Marx theory was

The capitalist societies are built on the conflict between social classes

Idea of Karl Marx

Thought that a class would struggle and result in workers taking power