America's grand strategy

wrote this in response to a NYT op-ed calling for a grand strategy in American foreign policy:

Our grand strategy should be driven by our core principles: liberty and justice for all - not only for those who happen to live in America.  If we can achieve that, the world will indeed be much safer, and more prosperous.  Madison understood tyrants - the bill of rights is needed everywhere.  Freedom of speech provides a corrective mechanism against corruption.  Our grand strategy should be to support these rights universally.  Whether that means we should act as a policeman, is a matter of tactics.

It seems so obvious to me, I don't know why the democratic candidates and others are not saying this.  Elizabeth Warren comes the closest, I think.