<human>:  With regards to the difference between capitalism and socialism, who was Karl Marx?
<bot>: Karl Marx was a German philosopher who is considered the father of socialism. He developed a theory called dialectical materialism, which is a system of thought that argues that history is driven by economic forces. Marx believed that history is shaped by class struggle and that the proletariat would eventually overthrow the bourgeoisie. He also wrote extensively about the relationship between economics and politics, arguing that capitalism would inevitably lead to communism.