Gary Hack is Professor Emeritus of City & Regional Planning at the University of Pennsylvania where he teaches, practices, and studies large-scale physical planning and urban design. He is the former dean of the UPenn School of Design, as well as a former chairman of the Philadelphia City Planning Commission. Prior to coming to Penn, he was a professor of urban design at MIT, and a partner in the firm of Carr Lynch Hack and Sandell. Hack has served as the principal urban designer for many projects domestically and internationally and has written numerous books on the topic.