The introduction to Boom Cities sets out the arguments and methodology of the book. It contends that the reshaping of central areas cannot be understood solely through architectural culture, but needs to be understood through the way that architectural culture became entangled with the political culture and ambitions of the period. Modernism, which has been the defining key in understanding this moment in all previous accounts, is therefore implicitly downgraded as an explanatory tool, and the book looks instead towards other explanatory categories, to better explain the seemingly contradictory features of complex individuals and the variety of their motives.