Philosophers, economists and politicians have sought to answer the question of which members of society deserve material rewards and how to decide what deserving is based upon. Perspectives of distributive justice vary from collectivism to extreme self-sufficiency; these perspectives vary between the importance of the group or individual respectively. Positions on distributive justice incorporate moral and political philosophies to form the extremes of communism (left wing) and libertarianism (right-wing) that exist on a continuum scale.