At one time, there were no laws in the U.S. against carrying a gun, although some states banned concealed carry. I don't know when the first such laws were passed, but I believe it was in the South after the Civil War, and was enforced only against blacks. (Almost every gun control law on the books has its origin in racism, something the anti-gun liberals know but won't admit. Unable to show their hatred and distrust of blacks and Hispanics, they pass laws to control them, disguised as gun control laws.)
As to carrying without a license, I will say, as I have before, that any one who feels he needs to carry a gun will carry one, no matter what the law says, since the consequences of not having a gun are worse than the consequences of being caught carrying illegally. Gun control laws cut down on carry by folks who just like to have a gun around but who do not seriously expect to have to use it.
In other words, locks keep honest folks honest.
Jim