Ukraine is entitled to its sovereignty, no matter who its neighbors happen to be. In the modern era, great countries accept that, and so must Mr. Putin. That is the message undergirding recent Western diplomacy. It defines the difference between a world governed by the rule of law and one answerable to no rules at all.

Instead of paving Russia’s path to greatness, invading Ukraine would ensure Mr. Putin’s infamy by leaving his country diplomatically isolated, economically crippled and strategically vulnerable in the face of a stronger, more united Western alliance.

Little effort was made to explain Saddam's culpability, his misuse of Iraqi resources, or the fact that we were not embargoing medicine or food. I was exasperated that our TV was showing what amounted to Iraqi propaganda...I must have been crazy; I should have answered the question by reframing it and pointing out the inherent flaws in the premise behind it. Saddam Hussein could have prevented any child from suffering simply by meeting his obligations. Instead, I said the following: 'I think this is a very hard choice, but the price, we think, the price is worth it.' As soon as I had spoken, I wished for the power to freeze time and take back those words. My reply had been a terrible mistake, hasty, clumsy, and wrong. Nothing matters more than the lives of innocent people. I had fallen into a trap and said something that I simply did not mean. That is no one's fault but my own.

Mr. Putin and his Chinese counterpart, Xi Jinping, like to claim that we now live in a multipolar world. While that is self-evident, it does not mean that the major powers have a right to chop the globe into spheres of influence as colonial empires did centuries ago. -->

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Hugh, I know I shouldn't even be asking you this, but what we really need in order to go in and take out Saddam is a precipitous event—something that would make us look good in the eyes of the world. Could you have one of our U-2s fly low enough—and slow enough—so as to guarantee that Saddam could shoot it down?

It is the threat of the use of force [against Iraq] and our line-up there that is going to put force behind the diplomacy. But if we have to use force, it is because we are America; we are the indispensable nation. We stand tall and we see further than other countries into the future, and we see the danger here to all of us.

In early 2000, I became the first senior U.S. official to meet with Vladimir Putin in his new capacity as acting president of Russia. We in the Clinton administration did not know much about him at the time — just that he had started his career in the K.G.B. I hoped the meeting would help me take the measure of the man and assess what his sudden elevation might mean for U.S.-Russia relations, which had deteriorated amid the war in Chechnya. Sitting across a small table from him in the Kremlin, I was immediately struck by the contrast between Mr. Putin and his bombastic predecessor, Boris Yeltsin. Whereas Mr. Yeltsin had cajoled, blustered and flattered, Mr. Putin spoke unemotionally and without notes about his determination to resurrect Russia’s economy and quash Chechen rebels. Flying home, I recorded my impressions. “Putin is small and pale,” I wrote, “so cold as to be almost reptilian.” He claimed to understand why the Berlin Wall had to fall but had not expected the whole Soviet Union to collapse. “Putin is embarrassed by what happened to his country and determined to restore its greatness.”