The open society and its life chances – from Karl Popper via Ralf Dahrendorf to a human geography of options and ligatures

Abstract. In recent decades, geography in the German-speaking world has been strongly oriented towards Anglo-Saxon and French concepts. For some years now, efforts have been emerging to consider the potential of German language, not only philosophical but also sociological and anthropological traditions of thought for human geography in Germany and beyond. This article considers two thinkers from the German-speaking world who have dedicated themselves to defending the open society: Karl Popper and his student Ralf Dahrendorf. In particular, the operationalization of open society considerations in Ralf Dahrendorf's conflict theory shows great potential especially for human geography research, as conflicts in the use and design of material spaces as well as over conceptual versions of spaces are commonplace. This thesis gains its current validity not least from the resurgence of authoritarian and totalitarian ideas that reject the achievements of open societies and always have spatial implications. It is therefore time to turn to the four central theorems of the two thinkers: (1) Popper's three worlds theory and (2) the concept of open society and (3) Dahrendorf's concepts of life chances and (4) conflict regulation.