Environmental issues came to the forefront of American thinking during the Twentieth Century. Scholars and scientists such as Aldo Leopold, Lynn White, Rachel Carson, Paul Ehrlich, Barry Commoner, Garrett Hardin, the Odum brothers, and the Club of Rome members raised alarms about the impact that human activities such as industrialization, over population, and intensive agriculture were having on our life support system, our global environment. Drs. Craig Davis and Bill Eisinger will examine how these and other concerned thinkers laid the foundation for the environmental movement that resulted in a global view our role in environmental degradation. In addition they will explore the many practical, moral, and ethical issues related to sustainability.