There has never been an evil infant born at the hospital. Although there can be spiritual behavioral problems. So the question is, what kinds of thoughts and emotional triggers are activated. Certainly everyone one has the potential for good or evil. There is usually a tipping point that has to do with anger, hurt, disappointment, loss of respect, abuse, misunderstanding, lack of forgiveness, no spiritual training, absence of love, mental health issues or mental and emotional disturbances......example: a person who can't adjust to others wrongs or mean behavior, so they make the choice to get even which later turns into aggression towards anybody.