He's as old as time and hails from the ancient Pangea. He's seen it all, and each historical event is burned into his mind. Though you probably just saw him taking his black coffee off the Starbucks counter.
The Year is 7984 and Pangea has reformed, destroying all of humanity's civilisation, killing everyone that lived on the surface, but some of humanity was still alive because the managed to escape Earth before the continents collided, but when they revisit, the planet is very different, forcing humans to form groups to protect each other against other survivors and evolved animals.