For centuries, the Middle Kingdom had assured its security by playing off distant barbarians against immediate neighbors. Deeply worried about Soviet… - Henry Kissinger

You should tell the Cambodians (i.e., Khmer Rouge) that we will be friends with them. They are murderous thugs, but we won't let that stand in the way. We are prepared to improve relations with them. Tell them the latter part, but don’t tell them what I said before.

I was intellectually convinced that Hanoi would settle only if deprived of all hope of victory by a determined military strategy. But I was emotionally close to many of the more moderate of the protesters who had been my contemporaries at university; therefore I was also the principal advocate in the administration for negotiations for a political solution to give the people of Indochina a genuine opportunity to choose this future. It turned out to be a rough ride, rougher by far than I imagined when I started on the task. Since then, the categories of our national debate on Vietnam have remained largely unchanged, compounded with the passage of time by an amnesia that suppresses events but remembers encrusted hatreds. A balanced judgment on Vietnam continues to elude us - and therefore the ability to draw lessons from a national tragedy which America inflicted on itself.

For nearly twenty years, Bismarck preserved the peace and eased international tension with his moderation and flexibility. But he paid the price of misunderstood greatness, for his successors and would-be imitators could draw no better lesson from his example than multiplying arms and waging a war which would cause the suicide of European civilization.