Abstract
The starting point of this chapter is the observation that at the global level the climate system is failing to produce the outcomes it was set up to produce and as such is lacking consistency integrity. That is, it is failing to act in accordance with its public institutional justification and the values embodied in it. However, emerging so-called polycentric systems are increasingly successful at addressing the challenges of global climatic change, according to economist Elinor Ostrom. The aim of this chapter is to discuss the possibility of applying the integrity approach to polycentric systems, which comprise a multitude of institutional, corporate and individual agents not all of which have a clear public institutional justification.