From Ammoland:

We will show how criminologists have been wearing ideological blinders that kept them from recognizing the benefits of armed civilians. We will cite research that shows Americans who own firearms do indeed protect their neighbors from criminal violence, and therefore, they should be seen as guardians. Using the logic developed by the criminologists, who believe that only unarmed guardians are beneficial to society, we will show that American firearm owners qualify as “guardians” just as much as, if not more than, unarmed civilians.