And this is called the late. Now to put it in context relative to these other civilizations, remember the ancient Sumerians were starting to be quite, I guess you could say civilized by about this period. You start having a lot of intermingling between the Akkadians and the Sumerians. As you get into the late third millennium, that's when you have the empire of Sargon the Great, the Akkadian Empire. As you get to the end of this mature period right over here, this is close to or around the time of Hammurabi, the Babylonian Empire. And in Egypt, if you go back to around 2500, around this time, that's when the pyramids were built. And you have the Egyptian kings, these god kings, that were ruling for most of this period right over here.