I'm a Brazilian, and I completely supported the creation of the gun control laws we currently have.
That said, I think our data is clear enough. As soon as we took the guns out of the streets, violence started to increase in a much bigger rate, and we are now almost in a civil war situation. Looks like the US stereotypical idea of a good men with a gun being the best deterrence to a bad men with a gun bears some truth.
The UK and Australia had the opposite experiences. But they are islands and already had fairly strict gun control. May I suggest that perhaps Brazil's efforts to systematically eliminate guns may have been less successful than anticipated.
That said, I think our data is clear enough. As soon as we took the guns out of the streets, violence started to increase in a much bigger rate, and we are now almost in a civil war situation. Looks like the US stereotypical idea of a good men with a gun being the best deterrence to a bad men with a gun bears some truth.