I just have some very general questions here about the Qin state before it went on to produce QSHD and the eventual takeover of China. What was it that the people of the seven states called themselves, people of the seven states? or something along the lines of a supraethnic like people of Zhou? Ok not so general anymore but yet I feel as though it is a general question that could be applied to a lot of things. Like if you take the Romans how did they find a solution to this same problem of labeling themselves which were either subjects to the state of Rome or some ethnic based identity? Going back to China it seemed Qin was in the west while other states that were "afraid" of it were to the east and so was there an east west divide in the past?
There was an e/w divide in the past.E/W china were divided by modern time Taihang mountain.This kind division at least lasted to Tang dynasty.
And the left 6 kingdoms looked down upon/were afraid of Qin for a lot of reasons.
For example, the king of Qing were from relatively low class.
And zhou is supraethnic?Sorry but I do not know how your definition of "ethnic"?
All those kingdoms in warrior state labelled them as 夏. 夏 is hieroglyphic,which looks like a human being. According to 说文解字, it means 中国之人, middle kingdom's people or just chinese people.
During the Spring and Autumn period as well as the Warring States period, whenever a state was conquered by another state, they would usually adopt surnames based on their former state. Makes sense in a way, since almost everyone in your village is related to each other and probably people from the next village a couple of meters away, especially if they shared the same sovereign ruler. So for example, when Zhao state was conquered by Qin, many people of Zhao adopted the surname Zhao. So I guess, in a sense, they considered themselves to be one people under different sovereigns.
As for the east and west divide? I guess so. Given the nature that Qin probably had access to mercenaries from the areas inhabited by 'western barbarians'.
During the whole Zhou dynasty, people can be divided into 2 class:
国民--people living in the cities, or nobles+freeman--they do have their own clan.
野人--people living in the rural area, or peasants/slaves--they do not have their own clan.
This division didn't disappear till Han dynasty.