How is the family hierarchy defined and what is the origin of the hierarchy?

I don't know if seniority is a culture, but it's really a science to find out about seniority. In China, the origin and history of generations are unknown to me. However, from the records in ancient books and my childhood experience, I feel that generations have changed and dynasties have changed, imperceptibly. Generation, for a person, is decided at birth, and he has no choice. The seniority between the same clan is strictly observed. For example, the title must be accurate. In daily life, we should pay tribute to our elders, give up our seats, and pay great attention to seating, so as not to confuse the etiquette. A person's words and deeds and even his fate will be influenced by clan etiquette and bound by traditional morality.