Why does investing in human capital make sense both on broad economic and individual scale?

Investing in human capital make sense both on broad economic and individual scale, because capital consists of anything that can enhance a person's power to perform economically useful work. Human capital is the capital possessed by individuals and groups. like talents, knowledge, experience, wisdom ... Possessing this kind of capital will result in individual success but also in broad economic, because with bigger human capital the person is able to achieve better results and to earn more, so at the end the person can spend more.