Haushofer was exposed to Ratzel, who was friends with Haushofer's father, a teacher of economic geography, and would integrate Ratzel's ideas on the division between sea and land powers into his theories by saying that only a country with both could overcome the conflict. Here, Hitler diverged with Haushofer's writings in consigning Germany to sole pursuit of land power. Ratzel's key contribution was the expansion on the biological conception of geography, without a static conception of borders. States are instead organic and growing, with borders representing only a temporary stop in their movement. It is not the state proper that is the organism but the land in its spiritual bond with the people who draw sustenance from it. The expanse of a state's borders is a reflection of the health of the nation. Haushofer adopts the view that borders are largely insignificant in his writings, especially as the nation ought to be in a frequent state of struggle with those around it. Ratzel's idea of "Raum" would grow out of his organic state conception. The early Lebensraum was not political or economic but spiritual and racial nationalist expansion. The "Raum-motiv" is a historically driving force, pushing peoples with great "Kultur" to naturally expand. Space for Ratzel was a vague concept, theoretically unbounded just as was Hitler's. "Raum" was defined by where German peoples live, where other inferior states could serve to support German peoples economically and German culture could fertilise other cultures. Haushofer would adopt that conception of "Raum" as the central program for German geopolitik, and Hitler's policy would reflect the spiritual and cultural drive to expansion. Rudolph Kjellén was Ratzel's Swedish student who would further elaborate on organic state theory and first coined the term "geopolitics". Kjellén's "State as a Form of Life" would outline five key concepts that would shape German geopolitik. Kjellén disputed the solely legalistic characterization of states by arguing that state and society are not opposites but rather a synthesis of the two elements. The state had a responsibility for law and order but also for social welfare/progress, and economic welfare/progress. Autarky, for Kjellén, was a solution to a political problem, not an economic policy proper. Dependence on imports would mean that a country would never be independent. Territory would provide for internal production. For Germany, Central and Southeastern Europe were key, along with the Near East and Africa.