ScienceDaily (Sep. 22, 2010) — Ever meet a kindergartener who seemed naturally compassionate and cared about others’ feelings? Who was cooperative and didn’t demand his own way? Chances are, his parents held, carried and cuddled him a lot; he most likely was breastfed; he probably routinely slept with his parents; and he likely was encouraged to play outdoors with other children, according to new research findings from the University of Notre Dame.

via Child rearing practices of distant ancestors foster morality, compassion in kids.

I guess what a friend mine always says about socially dysfunctional humans: Their parents didn’t love them enough.