'Modern Germany underwent a psychological transformation after the defeat of 1918, regressing to the power-politics of Frederick the Great and Bismarck. Nationalism was deliberately fostered and intensified, in reaction to Communism and alleged international Jewry. Adolf Hitler rose to power on this wave of primitive reaction, helped by the military and by big business, and was rapturously accepted by the mass-mind of the nation. Mutual interaction between the leader and the led brought about a unification of the nation