John Rawls wrote: Justice is the first virtue of social institutions, as truth is of systems of thought. A theory however elegant and economical must be rejected or revised if it is untrue; likewise laws and institutions no matter how efficient and well-arranged must be reformed or abolished if they are unjust.

Alasdair McIntyre wrote:What this brings out is that modern politics cannot be a matter of genuine moral consensus. And it is not. Modern politics is civil war carried on by other means,