Where the stakes are the highest, in the war on terror, we cannot possibly succeed without extraordinary international cooperation. Effective interna… - Barack Obama

As President Bush just said, a great nation doesn’t shy from the truth. It strengthens us. It emboldens us. It should fortify us.

Someone once wrote, “A bullet need happen only once, but for peace to work we need to be reminded of its existence again and again and again.” My fellow Americans, only we can prove, through words and through deeds, that we will not be divided. And we’re going to have to keep on doing it “again and again and again.” That’s how this country gets united. That’s how we bring people of good will together. Only we can prove that we have the grace and the character and the common humanity to end this kind of senseless violence, to reduce fear and mistrust within the American family, to set an example for our children. That’s who we are, and that’s who we always have the capacity to be. And that’s the best way for us to honor the sacrifice of the brave police officers who were taken from us this morning.

The fact that the world’s most prosperous and successful societies, the ones with the highest living standards and the highest levels of satisfaction among their people, happen to be those which have most closely approximated the liberal, progressive ideal that we talk about and have nurtured the talents and contributions of all their citizens. The fact that authoritarian governments have been shown time and time again to breed corruption, because they’re not accountable; to repress their people; to lose touch eventually with reality; to engage in bigger and bigger lies that ultimately result in economic and political and cultural and scientific stagnation. Look at history. Look at the facts. The fact that countries which rely on rabid nationalism and xenophobia and doctrines of tribal, racial, or religious superiority as their main organizing principle, the thing that holds people together – eventually those countries find themselves consumed by civil war or external war. Check the history books. The fact that technology cannot be put back in a bottle, so we’re stuck with the fact that we now live close together and populations are going to be moving, and environmental challenges are not going to go away on their own, so that the only way to effectively address problems like climate change or mass migration or pandemic disease will be to develop systems for more international cooperation, not less.