We have to be careful in negotiating with Iran that we don't create the impression among the Arab states and the Sunni states that we are working on a condominium between Iran and the United States, because that will panic them and drive them into making their own arrangement.

China is a country with a record of continuous self-government going back 4,000 years, the only society that has achieved this. One must start with the assumption that they must have learnt something about the requirements for survival, and it is not always to be assumed that we know it better than they do.

I do not know what will happen in China politically. I do know that it is impossible to maintain the communist system or probably even a strict one-party system when the economy becomes so pluralistic. Now, what form that takes and what institutions will evolve, I do not have a clear view about. I do not think the United States, as a general principle, ought to intervene in this.

I do not believe that Putin intends to leave office in a Cold War atmosphere with the United States.

America has made it very clear in several administrations that if there is an attack by China on Taiwan, the United States is very likely to resist.

We're at a moment when the international system is in a period of change like we haven't seen for several hundred years. In some parts of the world, the nation state, on which the existing international system was based, is either giving up its traditional aspects, like in Europe, or as in the Middle East, where it was never really fully established, it is no longer the defining element. So in those two parts of the world, there is tremendous adjustment in traditional concepts.

One theory is that we will make war look so attractive that we undermine the deterrent. That's Never Never Land. What we have now would have been enough to deter Hitler. But we are talking in a different order of reality.