Hans Joachim Schellnhuber is the founding director of the Potsdam Institute for Climate Impact Research, established in 1992. He is professor for Theoretical Physics at the University of Potsdam, senior research fellow at the Stockholm Resilience Centre, and member of the German Advisory Council on Global Change. He has authored, co-authored or edited almost 350 articles and more than 60 books in the fields of condensed matter physics, complex systems dynamics, climate change research, Earth System analysis and sustainability science.