Donald Trump’s recent speech to the United Nations lays out an approach to America interests that has not been seen among elite American institutions in some time. While the Security Studies Group claims no credit for the president’s speech—which was, as far as we know, written entirely without reflection on our work—the speech does in most respects harmonize with the approach we have been suggesting in our own Grand Strategy. Since the two approaches are so close in form, we thought that it might be helpful to the public discussion to publish our own introduction and moral defense of this approach. This is a public excerpt from our full Grand Strategy document. The intent of publishing this excerpt is to show that President Trump’s approach, though a significant departure from recent American foreign policy, is defensible both strategically and morally.