In this course students explore how people, acting through the private, public, and nonprofit sectors, can effect change in their communities using a “triple-bottom-line” approach–sustainable scale, just distribution and efficient allocation. Many organizations – private firms, non-profit organizations and government agencies – are in the process of designing and testing models of commerce in the hope of finding ways to protect the earth and its inhabitants while still generating profits. The course focuses on a number of these models, including Natural Capitalism, The Natural Step, Cradle-to-Cradle Design, the Sky Trust and the Global Reporting Initiative, and applies the models to students’ strategic enterprise plans.