American foreign policy has varied only in degree, not in kind. It has been cohesive, coherent, and consistent. What has varied has been its strength—and its critics.
".....as President Johnson himself made clear when he told American GIs at Camp Stanley, Korea: “Don’t forget, there are only 200 million of us in a world of three billion. They want what we’ve got and we’re not going to give it to them.”
[Johnson left out that the US stole what "we have" and plan on stealing the rest.]