Before the Spring and Autumn Period, what role did the patriarchal clan system of slavery play in learning in the government?

The patriarchal clan system of slavery also provided a link for the continuous continuation of "learning from politics" before the Spring and Autumn Period. Patriarchal clan system is an unequal hierarchy under the cover of blood. The so-called "Ming hierarchy is guided by ceremony" (On Guoyu Chu Language) is actually for the purpose of Ming hierarchy, distinguishing between the noble and the humble, establishing and maintaining the aristocratic status of slave owners and aristocratic groups, and strengthening the rule over civilians and slaves. Patriarchal system leads officials to be officials from generation to generation in politics. Academically, officials keep learning, and children learn from their fathers, but they are still academic officials. As for the civilians of other classes, "their ordinary manpower is ploughing, but the merchants don't know how to move" (Zuo Zhuan's Nine Years of "xianggong"), and they have worked for generations, so they have no reason to seek knowledge.