No, the biggest problem (IMO) is that we enshrine the right to bear arms, but mandate no education about firearms in public school. If we're going to embrace guns the same way we do cars, we should teach "shooter's ed" the same way we teach "driver's ed."

The second biggest problem is, even though most Americans agree that the root causes of violence need to be addressed (poverty, homelessness, unemployment, mental health, etc.) the sad reality of our political system is that these interests aren't represented because capitalists have hijacked our government for their own benefit.