So mandatory testing of everyone to determine if they are insane, and criminals don't get flagged until after their first crime? Sounds like you have it all figured out.
Just as I thought, pulling things outta your ass. The guy who sits there linking studies instead of evidence.that banks, and other places didn´t have security from the beginning? do i need a source for that? are you kidding me? the secret service was founded in 1865... just to mention one
Open a newspaper or turn on a television. Every day there are people hurting each other. If that's not a natural tendency, what is it?do you have a source for this claim?