"The laws that forbid the carrying of arms are laws of such a nature. They disarm only those who are neither inclined nor determined to commit crimes.... Such laws make things worse for the assaulted and better for the assailants; they serve rather to encourage than to prevent homicides, for an unarmed man may be attacked with greater confidence than an armed man."

- Thomas Jefferson, Commonplace Book (quoting 18th century criminologist Cesare Beccaria), 1774-1776

Which amazingly details the real world tangible inverse correlation between gun ownership and violent crime.  

It would be easier to abolish gun free zones, than to abolish guns:

"When terrorists attacked a school in Maalot in 1974, Israel did not declare every school a gun-free zone. It passed a law mandating armed security in schools, provided weapons training to teachers and today runs frequent active shooter drills. There have been only two school shootings since then, and both have ended with teachers killing the terrorists"

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