Carl Ritter
Johan Rudolf Kjellén (, 13 June 1864, Torsö – 14 November 1922, Uppsala) was a Swedish political scientist, geographer and politician who first coined the term "geopolitics". His work was influenced by Friedrich Ratzel. Along with Alexander von Humboldt, Carl Ritter, and Ratzel, Kjellén would lay the foundations for the German "Geopolitik" that would later be espoused prominently by General Karl Haushofer.