Capitalism is an economic system defined by private ownership of production assets and the operation of markets. It has key features like the existence of companies, a profit motive, competition between producers, freedom of enterprise, private property rights, economic inequalities, and the sovereignty of consumers. Supporters argue it is morally justified based on natural property rights and its economic benefits like efficiency. However, critics argue it leads to problems like inequality, concentration of wealth, and the formation of monopolies and oligopolies that undermine competition.