So you have the Himalayan mountains to the north, you have the Hindu Kush mountains to the north, and you have the Karakoram mountains to the north, which is going to give you a very good wall of defense. And I even have some more good news, kids. You have the Arabian Sea. All of these rivers flow into the Arabian Sea, which is going to give the Indus River Valley Civilization access to that water, and eventually access to the Persian Gulf, which is access to Mesopotamia. They're going to be like friends and such. So now that you know the very basics about the geography of that area, let's look at the beginnings of the roots of the Indus River Valley Civilization. Here we go.