Thanks for answering.
Well, most people don't kill people actually. Your logic is that they don't kill people because it's illegal? People already use heroin, for example. If it was legalized, do you think people would start using heroin in masses, like the wild wild West?
Well, I guess your friends and living in a familiar country take priority over the cannabis business. That's totally fine. I was just putting it out there as an option.
I didn't say most will, but the law of the land would change significantly and it goes back to more lawlessness. You will find there is more murders and rapes etc where there's very little going to be done about it. Obviously the threat of punishments and even the death penalty doesn't stop people from killing or committing crimes, but I would see it as going to some sort of post-apocalyptic scenario where it's everyone for themselves and you fend for your own life and family. There will be certainly less systems in place to prevent and investigate such crimes after they've happened I think.
The Bible pretty much is the best guide for non-aggression. Why? Because all the forms of accidental and intentional aggression are dealt with properly, according to the non-aggression principle, in the Bible.
New testament is fairly non-aggressive. But the Old Testament! Oh my 
OT should be flagged as "not for under 18" because it contains some explicit violence. Its principle being "an eye for an eye, a tooth for tooth" would turn the whole world blind and toothless.
But you must already know this. Check out Buddhism or M. Luther King if you want to know what non-violence is.
Sorry for the off topic, but I'm sensitive to exaggeration.
The Old Testament "eye for eye," etc., is simply a form of self defense. I mean, if someone hits you for no reason, are you happy with that? You might be able to shrug off a simple bruise. But what about when he starts killing off you children? That's part of what O.T. law is about. The rest of it is about how God reacts to people hurting Him and themselves by sinning against Him and creation (often themselves). Doesn't God have the right to self-defense, and defense of His children?
There's also another great saying: An eye for an eye leaves the whole world blind. The bible also says many other contradictory things like turn the other cheek, love your neighbor and so on.