Marc J. Epstein Ph.D., is a world authority on corporate accountability. Previously a professor at Harvard, Stanford, and INSEAD business schools, he is currently a research professor of management at Rice University in Houston, Texas. He has written a dozen books and nearly 100 articles. His books include the award-winning Corporate Environmental Performance and more recently Making Sustainability Work.

Bill Birchard is a journalist and book consultant based in Amherst, New Hampshire. He specializes in business, management, and the environment. Formerly editor of Enterprise magazine, he has contributed to CFO, Fast Company, Tomorrow, and other publications. His books include Nature's Keepers and Merchants of Virtue. Visit his website at