Another factor was that Hitler's deeply-held racial prejudices made him see the US as a decadent bourgeois democracy filled with people of mixed race, a population heavily under the influence of Jews and "Negroes", with no history of authoritarian discipline to control and direct them, interested only in luxury and living the "good life" while dancing, drinking and enjoying "negrofied" music. Such a country, in Hitler's mind, would never be willing to make the economic and human sacrifices necessary to threaten National Socialist Germany[1] — and thus set the stage for a dangerously inaccurate view of the very nation that Hitler had stated in his unpublished Zweites Buch (Second Book, 1928) would be the Third Reich's most serious challenge beyond his intended defeat of the Soviet Union.[24]