But the world is ever more interdependent. Stock markets and economies rise and fall together. Confidence is the key to prosperity. Insecurity spreads like contagion. So people crave stability and order.

You get these insurgent movements of populism, left and right. An insurgent movement of populism took my political party over in the UK for example.

I just want to say this. I want to say it gently but I want to say it firmly: There is a tendency for the world to say to America, ‘the big problems of the world are yours, you go and sort them out,’ and then to worry when America wants to sort them out.

Once his wife goes to sleep it takes a minor nuclear explosion to wake her.

Education is the best economic policy there is.

When my parents were growing up the world's population was under three billion. During my children's lifetime, it is likely to exceed nine billion. You don't need to be an expert to realise that sustainable development is going to become the greatest challenge we face this century

If you are trying to take a difficult decision and you're weighing up the pros and cons, you have frank conversations. Everybody knows this in their walk of life.