JOHN D. STERMAN, Standish Professor of Management at the MIT Sloan School, author of Business Dynamics: Systems Thinking and Modeling for a Complex World (2000), specializes in systems thinking for corporate and public policy, behavioral decision theory, nonlinear dynamics, and economic dynamics. Sterman uses system dynamics - a framework for understanding complex situations - to examine how people approach complex decisions and discover why dysfunctional dynamics persist in organizations. Using management "flight simulators" that Sterman and his students have developed, managers can design effective policies to improve the long-term performance of their organizations. Recent applications include the semiconductor, automotive, and computer industries; and issues from growth strategy to process improvement and product development. PETER M. SENGE is a Senior Lecturer at the Massachusetts Institute of Technology and Chairperson of the Society for Organizational Learning (SoL), a global community of corporations, researchers, and consultants dedicated to the "interdependent development of people and their institutions." He is the author of the widely acclaimed book, The Fifth Discipline: The Art and Practice of The Learning Organization (1990) (over 750,000 in circulation) and co-author of three field books, The Fifth Discipline Fieldbook: Strategies and Tools for Building a Learning Organization (1994), and The Dance of Change: The Challenges to Sustaining Momentum in Learning Organizations (1999), and Schools That Learn: A Fifth Discipline Fieldbook for Educators, Parents, and Everyone Who Cares About Education(2000). Harvard Business Review has identified The Fifth Discipline as one of the seminal management books of the past 75 years. The Journal of Business Strategy named Dr. Senge as one of the 24 people who had the greatest influence on business strategy over the last 100 years. ARY L. GOLDBERGER, M.D., is a pioneer in the application of concepts from nonlinear dynamics ("chaos theory") to human physiology and human organizations. His recent work focusses on the dynamics of human creativity and on health and disease in complex organizations. He is Director of the Margret and H.A. Rey Institute for Nonlinear Dynamics in Physiology and Medicine at Beth Israel Deaconess Medical Center, Professor at Harvard Medical School and Program Director of the NIH/NCRR Research Resource for Complex Physiologic Signals. YANEER BAR-YAM is President of the New England Complex Systems Institute, Chairman of the International Conference on Complex Systems, Managing Editor of InterJournal, and author of Dynamics of Complex Systems (1997), the only textbook to address the entire field of complex systems. Bar-Yam uses complex systems concepts to understand how organizations and patterns of behavior arise, evolve, adapt, and how we can use multiscale representations to relate fine and large scale, short and long term perspectives. Applications are to the relationship of structure and function and meeting complex challenges at all scales.