Lebensraum (German pronunciation: [ˈleːbənsˌʁaʊm] , living space) is a German concept of expansionism and Völkisch nationalism, the philosophy and policies of which were common to German politics from the 1890s to the 1940s. First popularized around 1901, Lebensraum became a geopolitical goal of Imperial Germany in World War I (1914–1918), as the core element of the Septemberprogramm of territorial expansion. The most extreme form of this ideology was supported by the Nazi Party and Nazi Germany. Lebensraum was a leading motivation of Nazi Germany to initiate World War II, and it would continue this policy until the end of the conflict.
Following Adolf Hitler's rise to power, Lebensraum became an ideological principle of Nazism and...