expressly for acquiring —all in fulfillment of the "biological necessity" to protect German racial supremacy. Vanquishing the Slavic and the Latin races was deemed necessary because "without war, inferior or decaying races would easily choke the growth of healthy, budding elements" of the German race—thus, the war for was a necessary means of defending Germany against cultural stagnation and the racial degeneracy of miscegenation. Racial ideology In the national politics of Weimar Germany, the geopolitical usage of is credited to Karl Ernst Haushofer and his Institute of Geopolitics, in Munich, especially the ultra-nationalist interpretation to avenge military defeat in the First World War (1914–18) and reverse the dictates of the Treaty of Versailles (1919), which reduced Germany geographically, economically, and militarily. The politician Adolf Hitler said that the Nazi geopolitics of "inevitable expansion" would reverse overpopulation, provide natural resources, and uphold German national honor. In (1925; My Struggle), Hitler presented his conception of as the philosophic basis for the Greater Germanic Reich that was destined to colonize Eastern Europe—especially Ukraine in the Soviet Union—and so resolve the problems of overpopulation, and that the European states had to accede to his geopolitical demands. The Nazi usages of the term were explicitly racial, to justify the mystical right of the racially superior Germanic peoples () to fulfill their cultural destiny at the expense of racially inferior peoples (), such as the Slavs of Poland, Russia, Ukraine, and the other non–Germanic peoples of "the East". Based upon Johan Rudolf Kjellén's geopolitical interpretation of Friedrich Ratzel's human-geography term, the Nazi régime (1933–45) established as the racist rationale of the foreign policy by which they began the Second World War, on 1 September 1939, in an effort to realise the Greater Germanic Reich at the expense of the societies of Eastern Europe. First World War nationalist premise In September 1914, when the German victory in the First World War appeared feasible, the German government introduced the as an official war aim (), which was secretly endorsed by Chancellor Theobald von Bethmann Hollweg (1909–17), whereby, upon achieving battlefield victory, Germany would annex territories from western Poland to form the Polish Border Strip (, ). would be realised by way of ethnic cleansing, the forcible removal of the native Slavic and Jewish populations, and the subsequent repopulation of the border strip with ethnic-German colonists; likewise, the colonisations of Lithuania and Ukraine. However, military over-extension lost the war