Human capital development is one of the emerging areas of study with regard to social science theory, practice, and research. A relatively new concept, human capital is described in terms of individual knowledge skills and experience. It is currently expressed as a function of education as well as a measure of economic activity. Little theory exists to establish models of individual or group human capital. By drawing upon existing physical science constructs such as embodied energy, this article applies a framework for articulating an approach to human capital development and interaction. Our proposition is that human capital consists of active and passive capacity, which parallels the theoretic dimensions of potential and kinetic energy. A conceptual binary phase diagram of a human capital system is presented along with examples for applying the model to practice. Utilizing an economic model of resource flows; a model of embodied human capital is developed as a vehicle for sustainable human capital theory. (Contains 1 figure.)