What is a failed state? Not so long ago, when I was Britain’s Overseas Development Minister, and later European Commissioner for External Affairs, I would probably have tried to answer the question by pointing to specific examples, including several countries in Latin America and Africa.

I would have highlighted tribal conflicts, military coups, economic failure, extremes of poverty, and high mortality rates. I might have referred to the failure of more prosperous societies to ensure that globalisation helped everyone and did not leave some communities trapped in deprivation. In addition, I would certainly have mentioned systems of government that had ceased to deliver what they were intended to do, and certainly what outside well-wishers hoped and assumed they would do.