But now, we are becoming suspicious of the very things we have long celebrated - free markets, trade, immigration, and technological change. And all this is happening when the tide is going our way. Just as the world is opening up, America is closing down.

In a very weak economy, when you say 'cut government spending,' what you mean is you're laying off school teachers and you're de-funding various programs that put money into the economy. This means you have more unemployed people that then draw unemployment benefits and don't pay taxes.

China is ruthlessly pragmatic. It supports North Korea for its own selfish interests. And I believe that China no longer considers us an ally. The current president, Xi Jinping, cultivates close relations with South Korea. He has never met with me, the leader of North Korea, something that the leader of China has always done. At the grand celebrations in Beijing two years ago commemorating the 70th anniversary of the end of World War II, he placed the president of Russia and the president of South Korea at his side. In North Korea, we pay a lot of attention to ceremonies and what they signal.

The great drama of Russian history has been between its state and society. Put simply, Russia has always had too much state and not enough society.

But as the arms-control scholar Thomas Schelling once noted, two things are very expensive in international life: promises when they succeed and threats when they fail.

If you listen to the political discourse in America today, you would think that all our problems have been caused by the Mexicans of the Chinese or the Muslims. The reality is that we have caused our own problems. Whatever has happened has been caused by isolating ourselves or blaming others.

In the 1990s, we were certain that Saddam Hussein had a nuclear arsenal. In fact, his factories could barely make soap.