Rise of Fascism. As the United States turned inwards to deal with the lingering effects of the Depression, militaristic regimes came to power in Germany, Italy, and Japan promising economic relief and national expansion.
Human faces are one of an infant's favorite and fascinating things to observe, especially when it's mom or dad or his own image staring back at him in a mirror. By 3-months-old, most babies know the difference between familiar faces and strange ones.
1 Human (Homo Sapiens): Humans begin to show self-recognition in the mirror test when they are about 18 months old, or in what psychoanalysts call the  mirror stage .