^^^^The society that exists between two human beings like you and I.
What other society exists?
Society is the cumulative assembly of relationships between networked individuals. (my definition)(totally meaninglessness , I know).
Each individual A will have many different relationships with another individual B.
At home my wife is the boss, she sorts out the duties for everybody. I get to do the garbage, the lawn, and a long list of unspecified things.
In this instance I am the subordinate and she is the superior.
When it comes to managing our overall finances I am superior and she is the subordinate.
At the same time we make all 'big' decisions jointly and there is no superior and subordinate.
When you have a society with more then two people there are going to be times when you need a third person in order to resolve a dispute.
And in the narrow confines of the details of that dispute that third person is 'superior' to the other two 'subordinates'. This is because this third person has made the decision which overrules the thinking of the other two.