Capitalism is often thought of as an economic system in which private actors own and control property in accord with their interests, and demand and supply freely set prices in markets in a way that can serve the best interests of society. Voluntary trade is the mechanism that drives activity in a capitalist system. The owners of resources compete with one another over consumers, who in turn, compete with other consumers over goods and services. The industrialization of mass enterprises, such as the cloth industry, gave rise to a system in which accumulated capital was invested to increase productivity capitalism, in other words.