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. Haushofer was not interested in economic policy, but advocated autarky as well; a nation constantly in struggle would demand self-sufficiency. Haushofer's contribution Haushofer's geopolitik expands upon that of Ratzel and Kjellén. While the latter two conceive of geopolitik as the state as an organism in space put to the service of a leader, Haushofer's Munich school specifically studies geography as it relates to war and designs for empire. The behavioral rules of previous geopoliticians were thus turned into dynamic normative doctrines for action on lebensraum and world power. Haushofer defined geopolitik in 1935 as "the duty to safeguard the right to the soil, to the land in the widest sense, not only the land within the frontiers of the Reich but also the right to the more extensive Volk and cultural lands". Culture itself was seen as the most conducive element to dynamic special expansion. It provided a guide as to the best areas for expansion and could make expansion safe, but projected military or commercial power could not. Haushofer even held that urbanisation was a symptom of a nation's decline by giving evidence of a decreasing soil mastery, birth rate and effectiveness of centralized rule. To Haushofer, the existence of a state depended on living space, the pursuit of which must serve as the basis for all policies. Germany had a high population density, but old colonial powers had a much lower density, a virtual mandate for German expansion into resource-rich areas. Space was seen as military protection against initial assaults from hostile neighbors with long-range weaponry. A buffer zone of territories or insignificant states on one's borders would serve to protect Germany. Closely linked to that need was Haushofer's assertion that the existence of small states was evidence of political regression and disorder in the international system. The small states surrounding Germany ought to be brought into the vital German order. These states were seen as being too small to maintain practical autonomy even if they maintained large colonial possessions and would be better served by protection and organization within Germany. In Europe, he saw Belgium, the Netherlands, Portugal, Denmark,