“I stress the strength of our economy because it is essential to the strength of our nation. And what is true in our case is true in the case of other countries. Their strength in the struggle for freedom depends on the strength of their economic and their social progress. We would be badly mistaken to consider their problems in military terms alone. For no amount of arms and armies can help stabilize those governments which are unable or unwilling to achieve social and economic reform and development. Military pacts cannot help nations whose social injustice and economic chaos invite insurgency and penetration and subversion. The most skillful counter-guerrilla efforts cannot succeed where the local population is too caught up in its own misery to be concerned about the advance of communism.”

Source: 1962, Address and Question and Answer Period at the Economic Club of New York

Global Ideas from Pluto's Challenger (May 21, 2009)

1963, Remarks Prepared for Delivery at the Trade Mart in Dallas
Context: Our security and strength, in the last analysis, directly depend on the security and strength of others, and that is why our military and economic assistance plays such a key role in enabling those who live on the periphery of the Communist world to maintain their independence of choice. Our assistance to these nations can be painful, risky and costly, as is true in Southeast Asia today. But we dare not weary of the task. For our assistance makes possible the stationing of 3-5 million allied troops along the Communist frontier at one-tenth the cost of maintaining a comparable number of American soldiers.

1960s, Farewell address (1961)
Context: We now stand ten years past the midpoint of a century that has witnessed four major wars among great nations. Three of these involved our own country. Despite these holocausts, America is today the strongest, the most influential, and most productive nation in the world. Understandably proud of this pre-eminence, we yet realize that America's leadership and prestige depend, not merely upon our unmatched material progress, riches and military strength, but on how we use our power in the interests of world peace and human betterment.

“Strength | Vegan Strongman Patrik Baboumian,” video PSA for PETA (31 December 2014) https://www.youtube.com/watch?v=RMWmZ3lE-uc.

Speech on the “21st Anniversary of the National Socialist Party” https://en.wikisource.org/wiki/Adolf_Hitler%27s_Speech_on_the_21st_Anniversary_of_the_National_Socialist_Party_(24_February_1941) (24 February 1941)
1940s

Report on the Potsdam Conference (1945)
Context: Any man who sees Europe now must realize that victory in a great war is not something you win once and for all, like victory in a ball game. Victory in a great war is something that must be won and kept won. It can be lost after you have won it — if you are careless or negligent or indifferent.
Europe today is hungry. I am not talking about Germans. I am talking about the people of the countries which were overrun and devastated by the Germans, and particularly about the people of Western Europe. Many of them lack clothes and fuel and tools and shelter and raw materials. They lack the means to restore their cities and their factories.
As the winter comes on, the distress will increase. Unless we do what we can to help, we may lose next winter what we won at such terrible cost last spring. Desperate men are liable to destroy the structure of their society to find in the wreckage some substitute for hope. If we let Europe go cold and hungry, we may lose some of the foundations of order on which the hope for worldwide peace must rest.
We must help to the limits of our strength. And we will.

1963, Remarks Prepared for Delivery at the Trade Mart in Dallas