During a heated discussion regarding the Occupy protests someone stated with authority that capitalism

The essential nature of capitalism is social harmony through the pursuit of self-interest. Under capitalism, the individual’s pursuit of his own economic self-interest simultaneously benefits the economic self-interests of all others. In allowing each individual to act unhampered by government regulations, capitalism causes wealth to be created in the most efficient manner possible which ultimately raises the standard of living, increases the economic opportunities, and makes available an ever growing supply of products for everyone. The free-market operates in such a way so that as one man creates more wealth for himself, he simultaneously creates more wealth and opportunities for everyone else, which means that as the rich become richer, the poor become richer. It must be understood that capitalism serves the economic self-interests of all, including the non-capitalists.