The diagram M-C-M is a concept created by Karl Marx. This concept explains how capitalist increase and maintain their wealth. “M” stands for money. This is the initial amount of money that a capitalist will start with to possibly invest and/or create. “C” stands for commodity. The capitalist will use their money to invest in labor and workers to create a product that will generate money. The “M” also stands for money. This is the profit from both the product and the surplus value from the worker’s labor.