Fortunately, the Founding Fathers understood the importance and value in a person being able to adequately defend his or her own life. It's first on the list of the most 'fundamental' of freedoms; that 'law abiding' citizens are able to have the ability, at any time, to protect him or herself from crime and homicide. After all, what is the value of life if one is not able to protect it?
Our legacy as a country has, after all, boldly made the point with its 'wild west' and 'mob boss' history and/or current mentality, or at least the perception of these by the masses. We produce the most mesmerizing tales of crime and intrigue both on the screen (Godfather, Sopranos) and on the real streets of every city in America. (While, of course, chronicling our 'adventures' with the likes of 'reality tv', just to shove the point up the collective *ss of our citizens, and the rest of the world, with a little more zeal, and just a little bit deeper. Not necessarily in that order, and not necessarily a bad thing, in my opinion.)
So maybe we all do have a reason to be just a 'little' paranoid.
The RIGHT to bear arms was recognized by the Founding Fathers because they understood what the pursuit of freedom was all about. They understood that freedom was power. With great power comes (no not great responsibility...) great risk, sometimes also coined by the popular phrase "Freedom Isn't Free." Funny how that phrase means something to all of us, no matter what side of the aisle we sit on, ain't it?
The Founding Fathers understood how to 'resonate' the pursuit of freedom and happiness with the language they crafted for our country and its government. But they also understood the 'nature' of the type of country they were creating, and that no matter how well a government's structure may be constructed, no matter how careful its language to protect its citizens, no matter how much opportunity for growth it provided its citizens, and no matter how many measures they took to protect the 'sanctity' of the government they were creating, great trepidation and animosity would rise up and grow equally as large. It doesn't matter if it's a thug breaking into your house while you sleep, or the rapist waiting behind that tree up ahead, in the dark, or a a 'hitman' pulling into your driveway on a Saturday afternoon. The danger is real and too common.
Has anyone ever really looked at our crime rate, by the way? The U.S. has the highest crime rate in the world. We have 2.2 million prisoners in this country. China is second with 1.5 million - with four times our population, mind you. Of course, that the U.S. has a completely ridiculous number of laws doesn't help with statistics, and some of the data provides puzzling results to most people with a brain. For example, of the 2.2 million, 57% of them are drug offenders. Only 5.5% are homicides. (I wonder how much of the 57% would go away for 'marijuana' were suddenly legalized. I can't find that data, but please do feel free to let me know if you do.

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The spirit of the Second Amendment, as I see it, is this: Be a law-abiding citizen. Carry your gun and carry some extra money. Give the extra money freely to those who deserve or truly need it, but shoot dead those who would kill you to steal it.
Seems pretty cut and dry to me.