With his own behavior, Hitler demonstrated to the world the kind of person his father was and the kind of treatment he suffered at his hands when he was a child: destructive, pitiless, ostentatious, merciless, boastful, perverted, self-enamored, shortsighted, and stupid. In his unconscious imitation he was faithful to his father's example. For the same reason, other dictators like Stalin, Mussolini, Franco, Ceausescu, Idi Amin, and Saddam Hussein behaved in a very similar way. Saddam's biography is a striking example of how extreme humiliation in childhood is avenged on thousands and thousands of victims at a later date.
-- Alice Miller, The Body Never Lies, p. 91-92