Let's consider removing guns from society ( take away the right to defend ourselves, our neighbors, and our country) the way we've changed many aspects of America; incrementally.   I suggest we start with the criminals.  Once we're able to lawfully remove guns from the hands of people that don't obey laws, here and in every country from where an outlaw may immigrate, then we can move on to good citizens.  We'll figured out something regarding any lawful entity that may want to harm you.