Is Xia, Shang and Zhou the poorest period of China's ancient thoughts and theories?

There is no written word handed down from ancient times in Xia Dynasty, and I don't know if there is any theory. There is a high probability that there is no.

In the middle of Shang dynasty, there were characters circulating, but they were basically divination characters with no theory.

The Zhou Dynasty, especially the Spring and Autumn Period and the Warring States Period of the Eastern Zhou Dynasty, was the most glorious period of China's thought and theory, and there was no one! Because a hundred schools of thought contended at that time, no one was dominant (like Confucianism, other theories were basically completely suppressed).

Therefore, the Zhou Dynasty was not a poor period, but the most glorious period.

Hope to adopt, thank you! ! !