not being loved by your family is the beginning, then it develops into;
http://en.wikipedia.org/wiki/Paranoia (you start to fear people want to harm you, because your own caregivers had mixed feelings about you and didnt want you or regret your birth / did harm you physically or psychologically; then you figure everyone else outside your family wants to hurt you and that everyone one only cares about his own survival / interests, and only deal with others in order to increase his/her own odds of survival first and foremost, which is actually true )
http://en.wikipedia.org/wiki/Schizoid_personality_disorder (you spend too much time alone -a behavior learnt during childhood when your parents moved from a place to another, not giving you the oportunity to create deep relationships with significants people ; you spend a lot of time observing people from outside and start figuring the patterns they follow, which are conditionned by natural selection, that they re just animals as you are, and that only domination is what matters, thus reinforcing your paranoia)
http://en.wikipedia.org/wiki/Schizophrenia (you become a danger for society as you are not part of it, do not want to be part of it, and end wanting to destroy it; others will reject you cause you endanger their odds of survival).
