'This is a fascinating collection of discussions by leading authors, ranging from philosophical perspectives to conceptual frameworks and mathematical models across many disciplines. A unifying theme is the role of human cognition and decision making, addressed via psychology, uncertainty and risk, evolutionary game theory, behavioral economics and more. The book should be a reference to anyone interested in the history of the field and as a source of ideas for the opportunities (and challenges) of treating cities as complex systems in contrast to less holistic approaches to urban planning and policy.'