Marxism is a radical criminological theory and believes that crime is the result of the oppression of the rich over the poor. This theory was not intentionally intended to describe crime at the time, but was more intended to promote socialism and downgrade capitalism. Radical theorists then took his idea and attempted to place blame on society rather than the individual – the main difference between Marxism and classical. Marxist followers agree that the “destructiveness” of capitalism promotes a “class struggle” which then leads to competition between rich and poor which in turn leads to crime on both ends of the spectrum. Barbara Sims puts this concept into great context when she says, “Capitalism produces 'haves and have-nots.' Each engages in a different type of crime. The “have-nots” take part in crimes that can be committed by uneducated people – using a knife or a gun. The “haves” engage in more sophisticated crimes – using banknotes, stock trading or white collar crimes” (Sims, 7). Many other criminologists argue that family structure, peer relationships, intelligence, and academic achievement keep the poor where they are. As can be seen, Marxist theory and classical theory of criminology both differ greatly, but above all on where the blame lies.