At the very foundation of a capitalist system is the belief in economic freedom. This freedom has two dimensions freedom of economic choice & freedom of enterprise.
Freedom of enterprise is usually more narrowly defined as the freedom to own & operate a business. It also entails the freedom to make all business decisions, limited only by competition & the interplay of the forces of supply & demand in the market place.
Individual decisions in a capitalist economy are directly influenced by self- interest. A business owner pursuing his own economic self-interest would benefit society as a whole.