Human capital refers to the stock of knowledge, skills, habits, and attributes embodied in individuals that facilitates the production of economic value. It is primarily built through investments in education, healthcare, and on-the-job training, which enhance the capabilities and productivity of people. Accumulation of tangible wealth like physical assets or machinery is distinct from human capital, though intangible wealth such as intellectual property and goodwill can be considered related to the outcomes of human capital development.