Ya, the original population of the world was wiped out thousands of years prior. Humans arrived on the new world in what is now known as the Exile Event during the Zero Year and branched out from there, the Blackreaver Kingdom being the oldest in the world.
As for Gleamstones, they're used all over. Private, Commercial, and Military; lots of people use them but they're still valuable due to a variety of things such as quality, type, magic-types, industrial-uses, etc. A popular usage among the upper classes of the world is jamming them into weapons to apply effects directly into weapon.
Been in Colorado for the past week or so. You guys are a lot further ahead than Illinois is. Lots more bike paths and lanes, better traffic control that doesn't result in stop and go movement, overall a lot more green space in your shopping centers and in human spaces, also lots more walking areas.
Don't beat up your state too much, it's fantastic compared to mine. :'c