Ben is Director of Centre for London. He is an experienced writer and broadcaster, specialising in cities, citizenship, social capital, public service reform, and the built environment. He was previously Associate Director at IPPR, and has led government strategy teams at local and national level. @ben_rog
Steven Johnson is a New York-based writer. His best-selling books on the history and psychology of innovation and invention including Emergence, The Ghost Map, Where Good Ideas Come From and, most recently, How We Got to Now.