The chapters thus take the form not of generalised, ‘universal’ analyses and prescriptions, but instead are critical and located reflections in thinking about how to plan, act and intervene in highly complex city, regional and national contexts. Chapter authors in this Companion are not all planners, or are planners of very different kinds, and this diversity ensures a rich variety of insights, primarily based on cases, to emphasise the complexity of the world in which planning is expected to happen. The book is divided into a framing Introduction followed by five sections: planning and the state; economy and economic actors; new drivers of urban change; landscapes of citizenship; and planning pedagogy. This volume will be of interest to all those wanting to explore the complexities of planning practice and the need for new theories of knowledge from which to draw insight to face the challenges of the 21st century.