Scientific revolution, right? Enlightenment, starting with Bacon and the scientific method, and then flowing into the political world of Hobbes and Locke, and then going into how government should work under Montesquieu, Rousseau, and Voltaire. And that will pretty much do it. But this is the theme of change, the theme of changing points in world history. So basically, if we're going to turn the wheel, we're turning it with a scientific revolution, and we're driving away from the Dark Ages and the Middle Ages into the Enlightenment and to the modern era. So where attention goes, energy flows. Make sure that you study with 100% of your energy, and don't take a break, because it's probably not working.