If a theory of justice is to guide reasoned choice of policies, strategies or institutions, then the identification of fully just social arrangements is neither necessary nor sufficient.
To conclude this discussion, assessment of justice demands engagement with the 'eyes of mankind',first, because we may variously identify with the others elsewhere and not just with our local community;second, because our choices and actions may affect the lives of others far as well as near;and third,because what they see from their respective perspective of history and geography may help us to overcome our own parochialism.
One has to be realistic. Ones concern for equity and justice in the world must not carry one into the alien territory of unreasoned belief. Thats very important.