Karl Marx was a communist. Communism is a political theory made up from Karl Marx, making 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 is a German Philosopher, political econimist,historian, sociologist, humanist, political theorist and he has been credited as the founder of communism. Marx wanted communism to rule the world because he thought that employes need more power and right that everyone should be at a same level of power, that a person should be paid according his needs. Karl Marx saw the workers as the good guy and he saw the rich and business owners as the bad people. So he supported the workers to start a revolution instead of telling them not to start a revolution. He was on the workers side. Also according to Marx communism had it's own seed of destruction.