"The geopolitical world is changing beyond recognition. The challenge of ensuring that in the future people can live better than today, while doing so within the Planetary Boundaries has yet to be met. Markets and the environment are increasingly globalized. Social protection and the search for equity are not, though there are interesting signs of change. There are many international institutions, but few are global. We have known for some time the necessary individual solutions required for the transition. Now, the WBGU report `World in Transition – A Social Contract for Sustainability´ offers us extremely interesting ideas on how we can bring all this together collectively through a new social contract that is global, equitable and green, and requires a new kind of global citizenship: the first steps toward a global political project for global sustainability."