“To build a genuinely sustainable economy, we need to recognize and embrace the dynamic nature of the world, and free ourselves from the dead holds of static dogma.”

Beast and Man: The Roots of Human Nature (1979).
Context: Do we find ourselves a species naturally free from conflict? We do not. There has not, apparently, been in our evolution a kind of rationalization which might seem a possible solution to problems of conflict--namely, a takeover by some major motive, such as the desire for future pleasure, which would automatically rule out all competing desires. Instead, what has developed is our intelligence. And this in some ways makes matters worse, since it shows us many desirable things that we would not otherwise have thought of, as well as the quite sufficient number we knew about for a start. In compensation, however, it does help us to arbitrate. Rules and principles, standards and ideals emerge as part of a priority system by which we guide ourselves through the jungle. They never make the job easy--desires that we put low on our priority system do not merely vanish--but they make it possible. And it is in working out these concepts more fully, in trying to extend their usefulness, that moral philosophy begins. Were there no conflict, it [moral philosophy] could never have arisen.

Source: Life

Source: Debunking Economics - The Naked Emperor Of The Social Sciences (2001), Chapter 8, Let's Do The Time Warp Again, p. 177

Kennedy's "focus on a more practical, more attainable peace, based not on a sudden revolution in human nature but on a gradual evolution of human institutions." was quoted by Barack Obama in his Nobel Prize acceptance speech.
1963, American University speech
Context: I am not referring to the absolute, infinite concept of peace and good will of which some fantasies and fanatics dream. I do not deny the value of hopes and dreams but we merely invite discouragement and incredulity by making that our only and immediate goal. Let us focus instead on a more practical, more attainable peace — based not on a sudden revolution in human nature but on a gradual evolution in human institutions — on a series of concrete actions and effective agreements which are in the interest of all concerned. There is no single, simple key to this peace — no grand or magic formula to be adopted by one or two powers. Genuine peace must be the product of many nations, the sum of many acts. It must be dynamic, not static, changing to meet the challenge of each new generation. For peace is a process — a way of solving problems.

Quote c. 1915 in 'Cubofuturism', Malevich, in his Essays on Art, op. cit., vol 2; as quoted in Futurism, ed. By Didier Ottinger; Centre Pompidou / 5 Continents Editions, Milan, 2008, p. 59
1910 - 1920

Source: "Mongolian President Tsakhiagiin Elbegdorj visits European Parliament" https://www.europarl.europa.eu/news/en/headlines/eu-affairs/20150605STO63234/mongolian-president-tsakhiagiin-elbegdorj-visits-european-parliament (9 June 2015)

"Interview: President Kim Dae Jung" in TIME Asia http://www.cnn.com/ASIANOW/time/magazine/99/0913/interview.html (13 September 1999)

as quoted in: Theories and Documents of Contemporary Art: A Sourcebook of Artists' Writings. ed. Stiles, Kristine and Selz, Peter (LA: University of California Press, 1996), p. 405; Cited in: John D. Powell. Preserving the unpreservable: A study of destruction art in the contemporary museum. University of Leicester, 2007. p. 30
Quotes, 1960's, untitled statements in 'Zero 3', (1961)