
I am thinking the planet is over 5 to 6 billion years old. The roads are just too worn down, plus the whole dragon spire thing really freaks me out. I am thinking the dragons spire was built outta some carbon fibre material as a orbital ring around the planet and for some reason a part if not all of it came crashing into the planet. The moon looks an awful lot like our moon, so is Vana'diel actually the earth aged a couple more billion years? The sun hasn't yet swelled up in the process of becomming a red giant, but it is not expected to do that for another 2 to 3 billion years. The continent layout is very different from earth, but the natural drifting would change the layout of the land quite easily. Also is the issue of scale. Based on how many Vana'diel days it takes to cross a certain distance i would say that the map of the known "Vana'diel" world is not that very big at all. Maybe about 500 miles across. What else exists out there? will we ever know?
Species is the next issue, if it is indeed a future version of the earth, then where did all the species come from? My theory is that they are a result of Genetic engineering gone amuck. The Elvaan, the Tarutaru, the Galka, and the mithra are all based off humans that have been engineered to fit a niche of some sort. Humes are the exception. My theory is that thousands of years ago some Galka were mining and ran across some humans in suspended animation from many millions of years ago, they were revived and the Humes, or Humans were a race reborn after being absent for a very long time. Did these revived humans know what had happened? Could they have lost their memories due to being in stasis for so long, or did they leave anything behind that may be a clue to what happened.
More to come as i pull it from the inner depths of my mind.