But other than that, we don't know a lot about their governmental systems, other than they must have been very intricate in order to build these cities with similar grid layouts across a thousand miles of land. We also know that they didn't have a lot of weapons. In all of the archaeological digs, very few weapons existed, especially any type of advanced weapons for that time period. They probably felt pretty safe. They were probably pretty peaceful people, and maybe that's going to be their undoing at the end. So at the end of the day, we need to understand that they mastered the water. Not only did they have this great bath to cleanse in, but they developed very intricate walls and canal systems in order to fill giant pools of water surrounding the city, so they had access to this water all year long.