This chapter is reprinted with permission from Sloan Management Review 42, no. 2 (Winter 2001): 24–40. Most of the ideas and many of the examples above come from the practitioners, researchers, and consultants in the SoL Sustainability Consortium, many of whom are quoted above. In addition, the authors would like to thank other consortium members who read the manuscript and offered helpful suggestions: Bernie Bulkin of BP, Amory and Hunter Lovins of the Rocky Mountain Institute, Otto Scharmer of MIT, Debbie Zemke of Ford, and Sara Schley and Joe Laur of Seed Systems, coordinators for the Consortium.