Why was there a lot of fighting toward the end of the Zhou Dynasty?

In order to attain supremacy

Explanation:

A lot of fighting occurs between seven states of the china toward the end of the Zhou Dynasty in order to attain supremacy over one another. This period ended with the victory of the Qin state over the others and the establishment of the Qin Dynasty occurs over the all states. The Qin state tried to erase the accomplishments of the Zhou in order to establish its own legacy.

fill in the blank

is slave