the world already has a social contract. it was created and designed in conjunction with the USA it was then abandonned and undermined and discredited by the USA it is called the international commision for human rights https://en.wikipedia.org/wiki/Human_rights_commission so obviousely you mean something completely different to a social contract. you need to be quite a bit different in how you define your idea. "Social Contract" is a maligned distopian adjunct p.s unfortunately due to the wars in the middle east the massive number of people stampeeding the southern border of Europe, it is giving more and more weight for the EU nations to abandon the Broken Global Social Contract and move toward insular dictatorship ideologies for self protection. maybe it would be better off for the invaded to invade those countrys where all the refugees are coming from so they dont have to leave. which is morally worse ? watching and doing nothing as people die paying people smugglers as they undermine the culture and economy of developed stable countrys ? or invading those countrys and throwing out the tyrants that created the civil wars in the first place ? which is morally superior ?