“The future cannot be won with the weapons of the past,” insisted Dakkar. “To rise up like Spartacus will only lead to millions of ordinary people being crucified, and the Caesars—and Czars—retaining an even tighter grip on power. No, no, the future must be won for justice and equality with the weapons of the future.”

Source: Time War (1974), Chapter 15, “The Crisis Point” (p. 155)

On Growth and Imperialism (1961)

Source: All the King's Men (1946)

Cavalry Journal (September 1933)

Presidency (1977–1981), Farewell Address (1981)
Context: Nuclear weapons are an expression of one side of our human character. But there is another side. The same rocket technology that delivers nuclear warheads has also taken us peacefully into space. From that perspective, we see our Earth as it really is — a small and fragile and beautiful blue globe, the only home we have. We see no barriers of race or religion or country. We see the essential unity of our species and our planet; and with faith and common sense, that bright vision will ultimately prevail.
Another major challenge, therefore, is to protect the quality of this world within which we live. The shadows that fail across the future are cast not only by the kinds of weapons we have built, but by the kind of world we will either nourish or neglect.

Source: Confessions of an Ugly Stepsister

Patrick J. Geary, The Myth of Nations: The Medieval Origins of Europe, Princeton University Press, 2003