It is the wealth of your parents, whether they own something or not. Capitalism is the people that own things like factories and business. The workers are the ones that don't. Marx saw the realm of culture, beliefs, ideas and social institutions as anchored in economic relationships. He attempts to understand the massive structures and institutions that affect the lives of people and how these changed over time. The primarily commercial structures involving factors such as the development of the productive forces and ownership or nonownership of the means of production. Marx had little concern over the division of knowledge into different academic disciplines.