How exactly does that make you no longer responsible for your actions? Are you saying that if you're born into a poor family then you have no choice but to murder, rape and steal? What is your point?
Are you saying that outside influence have no impact on the choices that a person does?
My original post is referring to competent adults, not children or the mentally disabled. I grant that if you are a retard, you aren't necessarily in control of your actions. Everyone else still has to take personal responsibility.
You didn't read the whole thing he wrote, did you?
And what if you didn't get lower IQ, just high agression from the lead poisoning? Then what? Still fully responsible?