David Blair (18 January) is right to draw attention to the calamities in South Sudan. One hopes the funds the UN is putting into the troubled country may do something for the refugees fleeing from the civil war there. The funds cannot begin to give any substance to the UN’s so-called Responsibility to Protect (R2P). This contentious human-rights “norm”, agreed by world leaders in 2005, was used by the UK to justify us interfering in Libya and has been used to press for the same in Syria and several other strife-torn countries. But the amount of money that would be needed in South Sudan to exert enough ­military persuasion to stop the rival armies from slaughtering each other – and the intervening party – dwarfs that being provided at present.The present c