Johan Rockström is a Swedish scientist, internationally recognized for his work on global sustainability issues. He is joint director of the Potsdam Institute for Climate Impact Research (PIK) in Germany. He is also Professor in Earth System Science at the University of Potsdam and Professor in Water Systems and Global Sustainability, Stockholm University. Rockström has pioneered work on the planetary boundaries framework, first published in 2009. The nine planetary boundaries presented in the framework, from climate to biodiversity, are argued to be fundamental in maintaining a "safe operating space for humanity. Rockström is also a public intellectual, providing advice e.g. to UN institutions, speaking e.g. at TED events, and featuring in media such as the Netflix "Breaking Boundaries" film. He has published over 150 papers in fields ranging from practical land and water use to global sustainability. He is ranked among the most cited researchers in the world by Clarivate Analytics. Johan Rockström was executive director of the Stockholm Environment Institute from 2004–2012, and director of the Stockholm Resilience Centre from 2007–2018.