I think it is essential that America does not stumble into a stupid war with Iran.

The Ukrainian opposition should adopt democratic unity as its main principle, and it also must have one leader.

For America, the chief geopolitical prize is Eurasia... Now a non-Eurasian power is preeminent in Eurasia - and America's global primacy is directly dependent on how long and how effectively its preponderance on the Eurasian continent is sustained.

Hard power makes sense under some circumstances. But there's not a universal solution to global problems. A major country like the United States has to have a broadly-conceived program for effective international action, influence and cooperation with others.

No matter how deeply disturbing the thought of using the environment to manipulate behavior for national advantages to some, the technology permitting such use will very probably develop within the next few decades.

We cannot have that relationship if we only dictate or threaten and condemn those who disagree.

The Israelis have taken a lot of security measures which reduce significantly the ability of Iran to inflict truly severe pain in Israel. But America is vulnerable with 100,000 troops in Iraq and more than half of that in Afghanistan, and we depend heavily on access to Middle Eastern oil. We're sitting targets for debilitating Iranian retaliation.