Nazi ideology was a set of beliefs held by the Nazi Party in Germany during the early to mid-20th century. Central to this ideology was the idea of Aryan supremacy, which claimed that people of Northern European descent were superior to other races. This belief justified extreme nationalism, militarism, and the persecution of those deemed "inferior," including Jews, Romani people, and others. Another key aspect of Nazi ideology was the concept of Lebensraum, or "living space." This idea promoted the expansion of German territory to provide resources and land for the growing population. It fueled aggressive military campaigns and contributed to the outbreak of World War II, leading to widespread devastation and loss of life.