Why were Hitler and his Nazi regime initially so popular, and how did their actions lead to World War II?

The most frightening dictatorship developed in Nazi Germany. A product of Hitler’s evil genius as well as of Germany’s social and political situation, the Nazi movement shared some of the characteristics of Mussolini’s Italian Fascist model. But Nazism asserted an unlimited claim over German society and proclaimed the ultimate power of its aggressive leader, Adolf Hitler. Nazism’s aspirations were truly totalitarian.