Funny, last I checked the Constitutional Convention was comprised of more than one person. Hence a collective coming together to agree upon certain legal privileges aka individual rights.
But the rights are part of each person as we define them.
IOW we placed the individual at the forefront not society.
As I said society does not preexist individuals.
Society is nothing but a group of individuals working together toward their own separate ends it is not an entity unto itself.
No, rights exist as legal collectives(whether they be nation states, monarchies, city states, empires) define them. Independent of a legal framework, these so called rights aren't even recognized. The concept of individual rights is primarily an enlightenment concept that certainly doesn't predate civilized society.
Also, biologically speaking, you are wrong as well, individuals are born of two people coming together. And individuals when they are born certainly aren't sovereign, but rather are dependent on their parents for care.