But in the midst of all of this, it ends up being a nomadic people that we really haven't talked a lot about in our survey of world history, that become the main catalyst for change over the next several hundred years. And that is the Mongols. So let's move forward to the year 1206. In the late 12th and early 13th centuries, you have a leader by the name of Timujin arise in Mongolia. And he's able to unite the various nomadic tribes and declares in 1206 a Mongol Empire, you see here in this yellow color. He is eventually called Genghis or Genghis Khan, the Great Khan, the Great Ruler, or the Universal Ruler. Now even though the Mongols were not a focus point of world history up until this point, they did have several very significant things going for them at this point in history.