But that's going to be characterized really by a thin strip of fertile soil surrounding that river. And as we get into the lower Nile, which is in the upper part, that's going to be characterized by a delta which is very lush and wider and larger because it's flowing into the Mediterranean Sea. So there are going to be different parts of the Nile. But starting around 5,000 BCE, we're going to see kind of farming villages pop up along the 750 strip of the Nile River. Now in the upper portion, which is that thin strip, you're surrounded by desert. So that's going to isolate those farming villages, allowing them to grow. We're not going to have a lot of invasions and warfare because of that natural protection.