It is because you are concentrating on the means, which if you really check things out have not really reduced the problem anywhere.  They have just lowered the rate of one method of mass killings.  It has not solved the problems of mass killings and never will.   We also need to bring back things like the idea of a nuclear family as a good thing.   Respect for one's elders.  The disciplining of children and foremost love and respect has to be reintroduced to this country.   On a lot of things, yes, we need to  go back to the way it was in the 40's and 50's.   I do not mean to say go back to the Jim Crow laws or the racist attitudes, but some of the ideas expressed by 'Leave it to Beaver' and other shows of that type.  and no there is no magic cure except for our nation to get to its knees and pray.