somebody on YT posted this link from the NY Times. Almost difficult to read to be honest. I admire parents who are dealt a rough hand and persevere, and do their best to raise 'good' kids. But in some cases it sounds like the genetics are against you.
http://www.nytimes.com/2012/05/13/magazine/can-you-call-a-9-year-old-a-psychopath.html
When there is a learning disability, psychiatric, developmental issues etc, the most common reason is because that is just who the kid is, they are literally ingrained in their genes. No there is no gene for each condition....that is not how genetics works....but genes that effect hormone regulation, and dopamine levels are a huge focus in the field of epidemic research regarding such issue.
Interesting gense work on a dimmer switch and can be turned up or down based on environmental influences such as food, medications, toxins, stress....and on and on.
When kids do have issues, it's often because their perception of what is going on around them is vastly different that it appears to everyone else....and when no one sees the world the way you do it can be very frustration.
Humans have survival instincts, we develop coping mechanism even unhealthy ones to deal with things in our lives.....the earlier an issue is noticed and addressed and understood, the earlier the child can develop healthy coping skills. The longer you wait you have to work on undoing a lot more bad habits so to speak.
and when you don't understand what the problem is, that's an incredibly difficult thing to do. Understanding what is motivating a child's behavior is HUGE in being able to correct it. If you don't understand where it's coming from, it's very difficult to teach the child an alternative, because the alternative is not satisfying the need that being met within that child during that action.
It's tricky, every kid is different, literally every kid. Even with the best help some kids will simply never live normal lives and the focus must come to keeping them safe from themselves and keeping others safe from them.