The Second Amendment was passed in an era when organized police forces were few and citizen militias were useful in maintaining the peace.
Peace is not a state - it is a choice, and you have to remake it every day. It's possible to get a sort of stability, a habit of peace, but it's like an egg balanced, spinning, on its point: lose your momentum, and your equilibrium is gone, too.
Some must be warriors, that others may live in peace.
Since long I've held silence a remedy for harm.
If peace is to be maintained, it must be by brave men.
Maintaining peace can be as strenuous as winning a war.
I don't want no problems. I don't want to know problems.