And one of those earlier pockets is in the Crescent Valley in the Middle East in a land called Mesopotamia. Now it's not like it's a country. It's not like people are like, hey, I'm from Mesopotamia, where are you from? Just kind of the area of the world that archaeologists and historians are going to be able to refer to so we know what we're talking about. But a lot of different civilizations and city states, which we're going to talk about, are going to develop in this area because of geography. Geography is muy, muy importante because really you're dealing in the Middle East with a lot of sand and it's a hot sun and you can get real thirsty. But luckily there are two rivers, count them, two rivers that flow through this Crescent Valley and as you can see from the map, it looks like a crescent.