That we have elected a President whose grasp of nuance far exceeds that of the progressives and conservatives who rage against his Afghanistan decision is oh so clear in his Nobel Peace Prize acceptance speech in Oslo.

Just some of Barack Obama’s historic words:

And so I come here with an acute sense of the cost of armed conflict – filled with difficult questions about the relationship between war and peace, and our effort to replace one with the other.

Whatever mistakes we have made, the plain fact is this: the United States of America has helped underwrite global security for more than six decades with the blood of our citizens and the strength of our arms.

So part of our challenge is reconciling these two seemingly irreconcilable truths – that war is sometimes necessary, and war is at some level an expression of human feelings.

I understand why war is not popular. But I also know this: the belief that peace is desirable is rarely enough to achieve it. Peace requires responsibility. Peace entails sacrifice.

That is what makes us different from those whom we fight. That is a source of our strength. That is why I prohibited torture. That is why I ordered the prison at Guantanamo Bay closed. And that is why I have reaffirmed America’s commitment to abide by the Geneva Conventions. We lose ourselves when we compromise the very ideals that we fight to defend. And we honor those ideals by upholding them not just when it is easy, but when it is hard.

For peace is not merely the absence of visible conflict. Only a just peace based upon the inherent rights and dignity of every individual can truly be lasting.

And yet, given the dizzying pace of globalization, and the cultural leveling of modernity, it should come as no surprise that people fear the loss of what they cherish about their particular identities – their race, their tribe, and perhaps most powerfully their religion.

The non-violence practiced by men like Gandhi and King may not have been practical or possible in every circumstance, but the love that they preached – their faith in human progress – must always be the North Star that guides us on our journey.

For if we lose that faith – if we dismiss it as silly or naïve; if we divorce it from the decisions that we make on issues of war and peace – then we lose what is best about humanity. We lose our sense of possibility. We lose our moral compass.