Nazi ideologies were a set of beliefs and ideas promoted by the National Socialist German Workers' Party (NSDAP) that emphasized extreme nationalism, racism, and totalitarianism. Central to these ideologies was the notion of Aryan supremacy, anti-Semitism, and the belief in the need for a strong, centralized state led by a dictatorial figure. These beliefs fueled policies of aggression and genocide during World War II, profoundly impacting Europe and the world.