Marilyn Hamilton, PhD, CGA, is an author, community organizer, and researcher with more than twenty-five years of multisector, international organization development experience. She is the founder of Integral City, TDG Global Learning Connections, and a founding member of the Integral Institute. Marilyn teaches leadership, organization change, and systems thinking at the graduate level with Royal Roads University, California Institute of Integral Studies, The Banff Centre, and Adizes Graduate School. She has authored and coauthored several books, including her most recent, Integral City. She is a graduate of University of Toronto (BA English, Diploma in Translation) and a Certified General Accountant. She completed her PhD (Administration and Management) in 1999, researching learning and leadership in self-organizing online community systems.