That nerdy kid
Vampire Slayer Slayer
sorry. i guess that is true. but then we also get problems of extreme similarities with Babylon, and that they occupy the some area on world maps (a map of mesopotamia on large or huge would be the only way to show both of them without very close borders). But, if you would really want a Sumerian civilization, a Ziggurat would be a cool replacement for the Monument (same time period) and The UA could be food related (invented irrigation)