
“In its failure to grasp this relationship between America and America's environment lies the moral and practical bankruptcy of any and all forms of isolationism. It is most unfortunate that this virus of isolationist sterility has so deeply infected an influential section of the Republican Party. For until the Republican Party can develop a vital philosophy and program for America's initiative and activity as a world power, it will continue to cut itself off from any useful participation in this hour of history. And its participation is deeply needed for the shaping of the future of America and of the world.”
While the quote seems modern, it’s taken from Henry R. Luce’s most famous essay, “The American Century,” published in Life magazine in February 1941.