I think Vladimir Putin will give up power.

Any international system must have two key elements for it to work. One, it has to have a certain equilibrium of power that makes overthrowing the system difficult and costly. Secondly, it has to have a sense of legitimacy.

Every success is usually an admission ticket to a new set of decisions.

In his essay, ‘Perpetual Peace,’ the philosopher, Immanuel Kant, argued that perpetual peace would eventually come to the world in one of two ways, by human insight or by conflicts and catastrophes of a magnitude that left humanity no other choice. We are at such a juncture.

I have said there are three principles that should be followed. One, we should maintain the "one China" policy that every American president has articulated, including President Reagan. Secondly, we should make clear that we want a peaceful resolution. And three, Taiwan should not challenge that arrangement in a way that will provoke a conflict. Those are three perfectly clear principles. I haven't used any of the other slogans.

Administration has managed the extraordinary feat of having, at one and the same time, the worst relations with our allies, the worst relations with our adversaries, and the most serious upheavals in the developing world since the end of the Second World War.

Our greatest foreign policy problem is our divisions at home. Our greatest foreign policy need is national cohesion and a return to the awareness that in foreign policy we are all engaged in a common national endeavor.