Society is a collection of individuals which should be ordered toward the common good (defense, commerce, worship, etc.) Society is inevitable and spontaneous wherever two or more people are gathered together. Man never exists outside of society for his entire life and normally exists within society. Men may exist in good or bad societies, but living extra-societally is pretty much impossible.
Is society binding on everyone? If so, why?
This is a nonsensical question. Can you rephrase it?
By what authority does society impose its idea of "rights" on individuals?
The object of law is the common good or the common welfare (as in the Constitution). The welfare of the society is of more importance than the welfare of one individual inasmuch as the whole is greater than its parts. This stands to reason since sometimes individual lives must be sacrificed for the greater good, as in war.