Today our concern must be with that future. For the world is changing. The old era is ending. The old ways will not do.
Abroad, the balance of power is shifting. There are new and more terrible weapons… The world has been close to war before, but now man, who has survived all previous threats to his existence, has taken into his mortal hands the power to exterminate the entire species some seven times over.
For I stand tonight facing west on what was once the last frontier. From the lands that stretch three thousand miles behind me, the pioneers of old gave up their safety, their comfort and sometimes their lives to build a new world here in the West. They were not the captives of their own doubts, the prisoners of their own price tags. Their motto was not "every man for himself," but "all for the common cause." They were determined to make that new world strong and free, to overcome its hazards and its hardships, to conquer the enemies that threatened from without and within.
Today some would say that those struggles are all over, that all the horizons have been explored, that all the battles have been won, that there is no longer an American frontier. But I trust that no one in this vast assemblage will agree with those sentiments. For the problems are not all solved, and the battles are not all won, and we stand today on the edge of a New Frontier, a frontier of unknown opportunities and perils, a frontier of unfulfilled hopes and threats."