Thomas Sowell asks a simple question in his latest column that could help refocus the national gun control debate.

Amid all the heated, emotional advocacy of gun control, have you ever heard even one person present convincing hard evidence that tighter gun-control laws have in fact reduced murders?

Think about all the states and communities within states, as well as foreign countries, that either have tight gun-control laws or loose or nonexistent ones. With so many variations and so many sources of evidence available, surely there would be some compelling evidence somewhere if tighter gun-control laws actually reduced the murder rate. And if tighter gun-control laws don’t actually reduce the murder rate, then why are we being stampeded toward such laws after every shooting that gets media attention? Have the media outlets that you follow ever even mentioned that some studies have produced evidence that murder rates tend to be higher in places with tight gun-control laws?

The dirty little secret is that gun-control laws do not actually control guns. They disarm law-abiding citizens, making them more vulnerable to criminals, who remain armed in disregard of such laws. In England, armed crimes skyrocketed as legal gun ownership almost vanished under increasingly severe gun-control laws in the late 20th century. (See the book Guns and Violence by Joyce Lee Malcolm.) But gun control has become one of those fact-free crusades, based on assumptions, emotions, and rhetoric.