John Rawls was a political philosopher concerned with social justice, specifically the best way that society could be structured so that individual rights and duties were fairly distributed amongst everyone and division of advantages from social cooperation were optimally determined. He believed that this conception of justice rested in principles that would be agreed upon by free, self-interested and rational persons in a starting position of equality and fairness. The principles of the theory of justice are ones that are meant to enable this group of people to cooperate with each other while recognizing that individuals in the group both share the same interests and have conflicting interests. These principles can be understood as underly...