Critical Heuristics of Social Planning has been recognised as the seminal work on critical systems thinking. Ulrich offers a new approach both to practical philosophy (which has until now remained rather unpractical) and to systems thinking (which has reduced the systems idea to a tool of merely instrumental, rather than practical, reason). Critical systems heuristics (CSH), as the approach is now generally called, provides planners, practitioners and policy makers with a conceptual tool for practising practical reason. It will enable them to identify and discuss systematically the value...