“Ultimately nations, like individuals, can not depend upon each other but must depend upon themselves. Each one must work out its own salvation. We have every desire to help. But with all our resources we are powerless to save unless our efforts meet with a constructive response. The situation in our own country and all over the world is one Chat can be improved only by bard work and self-denial. It is necessary to reduce expenditures, increase savings and liquidate debts. It is in this direction that there lies the greatest hope of domestic tranquility and international peace. Our own country ought to finish the leading example in this effort. Our past adherence to this policy, our constant refusal to maintain a military establishment that could be thought to menace the security of others, our honorable dealings with other nations whether great or small, has left us in the almost constant enjoyment of peace.”

Source: Defending increased naval expenditure; speech in Brighton (19 November 1895), quoted in The Times (20 November 1895), p. 7

Pierre Curie (1923), as translated by Charlotte Kellogg and Vernon Lyman Kellogg, p. 168

2016, Convention (August 2016)

1910s, Address to the Knights of Columbus (1915)
Context: All of us, no matter from what land our parents came, no matter in what way we may severally worship our Creator, must stand shoulder to shoulder in a united America for the elimination of race and religious prejudice. We must stand for a reign of equal justice to both big and small. We must insist on the maintenance of the American standard of living. We must stand for an adequate national control which shall secure a better training of our young men in time of peace, both for the work of peace and for the work of war. We must direct every national resource, material and spiritual, to the task not of shirking difficulties, but of training our people to overcome difficulties. Our aim must be, not to make life easy and soft, not to soften soul and body, but to fit us in virile fashion to do a great work for all mankind. This great work can only be done by a mighty democracy, with these qualities of soul, guided by those qualities of mind, which will both make it refuse to do injustice to any other nation, and also enable it to hold its own against aggression by any other nation. In our relations with the outside world, we must abhor wrongdoing, and disdain to commit it, and we must no less disdain the baseness of spirit which lamely submits to wrongdoing. Finally and most important of all, we must strive for the establishment within our own borders of that stern and lofty standard of personal and public neutrality which shall guarantee to each man his rights, and which shall insist in return upon the full performance by each man of his duties both to his neighbor and to the great nation whose flag must symbolize in the future as it has symbolized in the past the highest hopes of all mankind.

On relations between the US and the UK, as quoted in "Kingman Brewster Jr., 69, Ex-Yale President and U.S. Envoy, Dies" in The New York Times (9 November 1988)

Source: Excerpts of letter to his first wife (14 July 1975)

Ideology and Utopia (1929)

1900s, Inaugural Address (1905)
Context: The conditions which have told for our marvelous material well-being, which have developed to a very high degree our energy, self-reliance, and individual initiative, have also brought the care and anxiety inseparable from the accumulation of great wealth in industrial centers. Upon the success of our experiment much depends, not only as regards our own welfare, but as regards the welfare of mankind. If we fail, the cause of free self-government throughout the world will rock to its foundations, and therefore our responsibility is heavy, to ourselves, to the world as it is to-day, and to the generations yet unborn.

2000s, 2008, Address to the United Nations General Assembly (September 2008)