And it's this idea that if leaders become incapable, they become correct, that this guiding force of the universe will throw them out and put more capable leaders in power. And so King Wu of Zhou, who defeats Di Xin at the Battle of Muyi, he invokes this mandate of heaven and will continue to be invoked throughout the Zhou Dynasty. Now, the Zhou Dynasty is going to be a very long-lasting dynasty, but it is not centralized. It can be described as kind of a feudal system. There's multiple kingdoms who have allegiance to the Zhous, and at multiple times, they have different degrees of autonomy and of power. Now, the Zhou Dynasty is generally divided into the Western Zhou, when the capital's in the west, and the Eastern Zhou Dynasty, when the capital moves to the east. Now, the Eastern Zhou Dynasty, this period right over here between 770 BCE and 476 BCE, often known as the spring and autumn periods, this is often referred to as a significant period of philosophical golden age in China.