Hobbes/Egoism (with reference to) the social contract.
To be egoistic is to be in absolute self interest, with no moral dilemma or concern for others, and always act in your own selfish desire.
Acting against your own moral beliefs for the sacrifice of 'moral acceptance'.
We naturally become cooperative, because the only way to satisfy our interests is to cooperate.
(Fat kid selfish, keeps toys to himself. Wants other toy, must cooperate to get other toy).
It is a veil of ignorance shrouding us, that society accepts what we 'must do' but society doesn't dictate that at all. In fact society dictates what we should do, but we are voluntarily accepting the benefits of cooperating with society. Rationally self interested people, abuse the social contract for their own self gain.
There is no social formal agreement. The social contract only presupposes cooperation but can in no way enforce it. However if you could facilitate without cooperation, become wholeheartedly self sustainable, than each and every action you take can be to fulfil your selfish desires.
ArmouredGRIFFON is banned. He sends some notes for you to have a look at.