TBG

I'm not at all sure how useful Rawl's proposition would be as a tool of argumentation, but it does pose the question as to how would one organize a society so as to promote decisions in favor or greater fairness.

The one mechanism that physical and/or social evolution seems to have provided us for such purposes is compassion, which is uncertain, at best, even within immediate families. The further one moves from the family the less certain one can be that compassion will be forthcoming.

"It is not necessary to have hope in order to persevere."