If only. Unfortunately science has strong evidence to say that violence is hard coded into our genes. Those that lacked it (like bonobos) were likely unable to survive.
BUT humanity may change. Our jaws were once large enough to contain wisdom teeth nearly universally. Those who couldn't got infections and died. Once we figured out dentistry, those that had smaller jaws stayed in the gene pool. Babies are being born now without wisdom teeth at all. So perhaps violence shall genetically abate with time.
Until then, Mine shall help keep those important to me safe from those who are malignant.

Try again. It is indeed a right. How does a shift in scientific or social view alter the validity of a law? It doesn't. The constitution cannot be changed at any time, It can only be changed with a 2/3 majority in either both houses of congress or nationwide state convention. The fact that it was written in ink from a quill does not alter the validity either. If you drop the empty preemption, and had a better grasp on government, people might take you seriously. Try to learn something from somewhere other than Mainstream media (all the major corporations have horrid track records for making things up, lying outright (remember the "MIT shooting" story?) and never apologizing for placing speed over accuracy.
But if you did, then you'd likely have a much different tune.