Even a baby is capable of distinguishing a good person from an evil one, according to the authoritative scientific journal Nature (November, 2007).
Psychologists showed children 6-10 months old different toys: one of the characters climbed the mountain, the second helped him in this, and the third, on the contrary, interfered. All the kids gave a clear preference to the second, kind character. So it seems that moms and dads should trust their children more and help them not to lose this amazing ability.