I know it's a stupid argument. I'm just participating in it for the hell of it.
Is that a fact? What new crime was invented when guns first came around? Because stealing, rape and murder can all be accomplished without guns. In fact, they are accomplished today. Without guns.
Well, yes. But keep in mind the time-frame. Let's say that tomorrow all the guns in the world magically vanish, and everyone on earth is subconciously prevented from ever making a new one, EVER.
Well, swords and knives and crossbows may have been effective before the gun was invented. But they wouldn't be able to pull off that many crimes in this modern world.
Yeah, let me give you some examples:
Bank Robbery
Now how would this be accomplished without guns? People would obviously notice you walking in with a sword . . . perhaps a very large group could accomplish it, but that would be just as consipicuous.
Well, with knives perhaps. But since there's that counter and glass in the way of the robber and his target - what's he going to do? He'd need to threaten to throw the knife at the teller to accomplish the threat. And even if did try that avenue, he'd need a lot of fucking knives just in case he missed or there turned out to be more people when he thought. And even if he somehow manages to sneak in 20 throwing knives, it takes more time to reach for one, carefully handle it, and accurately fling it than it would for someone to just squeeze the trigger repeatedly.
Even with a bow of some kind, there's that long time when he's reloading the bow that will make him completely vulnerable - allowing anyone near him to take him down. Not to mention that you can't shoot through doors and desks with a crossbow.
So yes, robbing a bank would be incredibly difficult without guns in today's world.
And also, hijacking a car. As long as the motorist has both doors locked and windows rolled him - it'd be a very difficult task to accomplish with a knife, bow, or sword.
While primitive weapons may have once been effective, we are now capable of taking enough safety measures to make most large-scale crimes impossible using them. It would still be able to mug and rape and commit crimes on people in dark alleys and such - but otherwise, it would cut down on large-scale robbieries and such.