Nothing will change. The reason is that we are asking the wrong questions. It really is that simple. When you ask the wrong question, no matter how well thought out the answer, your results will be sketchy at best.
We are asking about gun violence. But really, that's the question we say we are asking. When we say we are asking about gun violence we are using a tiny percentage of gun violence as our sample.
Guns are relatively easy to use. Even the untrained can cause a fair amount of havoc with a gun. In some of the more thought out conversations I've had, this has been a contention of those suggesting more gun control laws. I regularly point out an incident I remember from my youth where a woman woke up one day and decided she wanted to hurt innocence. She then drove her car through a full pre-school playground. It happened and no gun was involved. If she had planned it for a year with a manifesto and on-line rants would her death toll have increased? The point is, the gun is a tool not the cause and it's not even the only tool capable of great damage.
So what is the right question? I would have to say that the right question is, "Why do we kill each other?" For those worldwide that are looking at the statistics related to gun deaths or mass shootings, now look at the stats again. You might find things have changed. But we still have a problem.
I consider Sweden, a place I love, to be my other home. I always thought that there were fewer violent crimes there. A quick look at a UN list shows that Sweden has 0.7 intentional homicides per 100,000 people per year. In the US the same list shows 4.7.
Now I think we have something to consider. Now I think we can talk apples to apples. Why do we kill?
Even if the United States were to somehow become gun free (even the "bad guys") we would have a homicide problem. People would find other ways of killing each other as they have since Cain became jealous of his brother.
I'm not going to try to answer all the country's problems in this post. But I do believe that if we can ask the right questions, we will begin to right the ship.