This smiling boy grew up to be one of the most evil men on earth

By all accounts, he was a lively, cheerful boy in his earliest years, full of energy and promise. But something changed.
Resentment toward his baby brother
By the time he started school at six, the boy was reportedly already grappling with feelings of abandonment and had begun to harbor resentment toward his baby brother. Teachers described him as timid and reserved, often sensing feelings of neglect as his father’s studies kept him away and his mother battled depression and hypochondria.
The household was tense. Arguments between his parents were frequent, and his mother even attempted suicide at least once, demanding constant attention and spending much of her time bedridden. The boy later admitted that he never felt his family was stable, never sure if his home would remain intact.