Chapter 7 is titled “Of Political or Civil Society,” but that title is a little bit deceptive. It begins with a few more appeals to religious beliefs in the beginning, attempting to emphasize (again) that familial and master/servant relations fall short of what Locke terms “political power.”
However, the real meat of the chapter is Locke’s argument against absolute monarchy as an example of a civil society. In short, by taking ultimate judgment powers upon himself (even for matters concerning himself), an absolute monarch of any kind effectively puts himself into the state of nature with respect to his people.
It is a simple and clear argument for rebellion against any totalitarian state.
We have some more issues with Locke’s assumptions of horizontal integration of the various roles that states usually monopolize, and he’s definitely keeping his toe off of any line that might get him officially sanctioned by the English king at the time, but the elements of the argument are there and are convincing:
If the state fails to serve the people, then those people need not remain subjugated by it. The purpose of society is to improve man’s lot compared to the state of nature/war.