“With the defeat of the Reich and pending the emergence of the Asiatic, the African and, perhaps, the South American nationalisms, there will remain in the world only two Great Powers capable of confronting each other—the United States and Soviet Russia. The laws of both history and geography will compel these two Powers to a trial of strength, either military or in the fields of economics and ideology.”

As quoted in "Xi, Obama vow to step up cooperation" http://english.cntv.cn/program/newsupdate/20130608/104235.shtml in cctv.com English (8 June 2013).
2010s

1970s, Remarks on Being Reelected (1972)

Source: Democracy in America, Volume I (1835), Chapter XV-IXX, Chapter XVIII.

2000s, Europe's Anti-American Obsession (2003)

Source: The State — Its Historic Role (1897), X
Context: Throughout the history of our civilization, two traditions, two opposing tendencies have confronted each other: the Roman and the Popular; the imperial and the federalist; the authoritarian and the libertarian. And this is so, once more, on the eve of the social revolution.
Between these two currents, always manifesting themselves, always at grips with each other — the popular trend and that which thirsts for political and religious domination — we have made our choice.
We seek to recapture the spirit which drove people in the twelfth century to organise themselves on the basis of free agreement and individual initiative as well as of the free federation of the interested parties. And we are quite prepared to leave the others to cling to the imperial, the Roman and canonical tradition.

Memo written as Chief Scientific Adviser to the UK Ministry of Defence https://www.theguardian.com/politics/2020/feb/01/britain-retrenched-island-europe-papers-react-to-brexit-day (1949)

De Colores Means All of Us: Latina Views for a Multi-Colored Century (2017)

1930s, On Protracted Warfare (1938)

Der Totalkrieg (Berlin, 1933), quoted in W. W. Coole (ed.), Thus Spake Germany (London: George Routledge & Sons, 1941), p. 139