I've been working to answer that question for a while. I think a lot of it has to do with parenting and how many people around the world still beat their children as if that's normal. Peaceful parenting is key. I'm not a fan of Stefan Molyneux lately, but his Bomb in the Brain series is pretty good.
No such place exists... YET. I don't think our species will always live in a state of violence. See Steven Pinker's Better Angles of Our Nature to see how human violence has gone down quite a bit in the last 100 years (even with WWI and WWII factored in) compared to the rest of human history.
I think a good approach for the future is to specialize in non-lethal defensive weapons. Those which tip the balance towards the defender and then we can use social pressure to discourage any moral, rational person from wanting a weapon designed for lethal aggressive attack over a weapon designed for non-lethal effective defense.
Equality under the law is vital for liberty and freedom. The ability to defend yourself with lethal force as a last resort must be maintained by individuals.
If it is not, then only agents of governments and criminals will have that ability. It creates a tyrannical system where most are in fear of and dependent upon the few for their security. That is an absolutely horrible idea.
There are a minority of human predators on this planet. We should remove them. At the very least we should make sure they know we are not easy prey. I don't want to taze a sociopath murderer or child predator. No, I want to kill them. Remove them.