Dieter Nellen is a consultant and writer working in the fields of urban planning, architecture, and culture. Uli Paetzel is chairman of the executive board of the Emschergenossenschaft and Lippeverband (EGLV) water management partnership, as well as an honorary professor at the Ruhr-Universität in Bochum. Stefan Siedentop is the managing director of research for the ILS Research Institute for Regional and Urban Development in North-Rhine Westphalia and a professor in the Faculty of Spatial Planning at TU Dortmund.