Mass Disappearances: Mystery Exodus or Alien Exile?

We've talked about people going missing in mysterious circumstances before, but what happens when entire villages, communities and even civilizations suddenly drop off the face of the earth? Could they have been whisked away to another planet by our space brothers, or maybe they were driven away by some evil, otherworldly force?... Either way, we're diving in and pulling out some crazy stories of mass disappearances! Enjoy!