Hemenway, David (2006). Private Guns, Public Health. Ann Arbor, Mich: University of Michigan Press. pp. 65. ISBN 0-472-03162-7. "...a careful analysis of the data did not show that guns reduce crime."
Source 19 of the wiki.
Anyway, giving guns to people to reduce crime is not solving the source of the problem, the crimes. We could argue about it all day long, each side will probably find sources and statistics data that prove our point of view.
I think, to reduce crimes rates, we should find the sources of the crimes first. A big majority didn't dream of becoming a criminal, but circumstances in life brought them at that point. It's not news that poor neighborhood have a higher crime rate than richer ones. Schools makes wonders long-term to reduce crime, but the effect of guns on crime rate is debatable. Why do you think there's a lot of people that think armed citizens is not a good idea? Because the effect is not as strong as you think, and doesn't solve the root of the problem.
Yeah, I agree than in certain countries in the world, I would prefer having a gun with me. But it's only a short-term solution, that only provides me self-defense in an hostile environment. Humans didn't evolve only by self-defense, but also by adapting their environment. In my country, we worked to provide free education and free health care to any citizen, while developing a strong police force. Since people have opportunities, they find crime less attractive and want to cooperate with the police force. Instead of having n00bs fighting crime, you have a group of professional that take care of it.
There is many solutions, but I don't think guns is useful on a long-term perspective. A bullet doesn't build, think or create. What you invest on bullets is lost opportunity to develop something else. Sure, you need a minimum of protection. But, let's say that one day, you succeed and everybody owns a gun. Ok, now what? What did you achieve with every citizens owning a gun? You really think crime will disappear? That the guy who need to steal or sell drug to survive is going to stop?
I think that until you make a safe society, you need guns for the time being, so that your citizens can survive. But I really think you should put energy to make a society where your citizens can feel safe without a gun. I mean, I'm lucky and I live in a society where I don't feel the need to have a gun for my safety. Here, having a gun is more trouble than anything, especially if you get caught.
And if you live in a society where you're more afraid of the corrupted police force or the governement than criminals, get a cellphone instead of a gun. Governments always have more guns than you, but can't do anything against information
Anyway, I know I'm against the majority here, and I simply taught that you could find interesting of having a complete opposite point of view of somebody who lives in a society where guns are irrelevant.