Linda Booth Sweeney, Ed. D., is a researcher and writer dedicated to making the principles of systems thinking and sustainability accessible to children and others. She has worked with Outward Bound, Sloan School of M.I.T., and Schlumberger Excellence in Educational Development, or SEED. She is the author of The Systems Thinking Playbook; When a Butterfly Sneezes: A guide for helping children explore interconnections in our world through favorite stories; Connected Wisdom: Living Stories about Living Systems and numerous academic journals and newsletters. Sweeney lives outside Boston, Massachusetts. More information is available at www.lindaboothsweeney.net. Dennis Meadows is Emeritus Professor of Systems Policy and Social Science Research at the University of New Hampshire, where he was also Director of the Institute for Policy and Social Science Research. In 2009 he received the Japan Prize for his contributions to world peace and sustainable development. He has authored ten books and numerous educational games, which have been translated into more than 15 languages for use around the world. He earned his Ph.D. in Management from MIT, where he previously served on the faculty, and has received four honorary doctorates for his contributions to environmental education.