The Social History of Art, Volume I. From Prehistoric Times to the Middle Ages, 1999, Chapter IV. The Middle Ages
“Great ages of innovation are the ages in which entire cultures are junked or scrapped.”
Source: 1990s and beyond, The Book of Probes : Marshall McLuhan (2011), p. 309
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Marshall McLuhan 416
Canadian educator, philosopher, and scholar-- a professor … 1911–1980Related quotes

Source: Sustainable History and the Dignity of Man (2009), p.171

“In an age of multiple and massive innovations, obsolescence becomes the major obsession.”
"Innovation is obsolete", Evergreen review, Volume 15, Issues 86-94, Grove Press, 1971, p. 64
1970s

January 1854
Notebooks, The English Notebooks (1853 - 1858)

"The Rise".
The Long-Legged House (1969)
Context: We haven't accepted — we can't really believe — that the most characteristic product of our age of scientific miracles is junk, but that is so. And we still think and behave as though we face an unspoiled continent, with thousands of acres of living space for every man. We still sing "America the Beautiful" as though we had not created in it, by strenuous effort, at great expense, and with dauntless self-praise, an unprecedented ugliness.

As quoted in "Steve Jobs: The Next Insanely Great Thing" in WIRED magazine (February 1996) http://www.wired.com/wired/archive/4.02/jobs_pr.html
1990s

“A cultured, sensitive, observant man is a pleasure to be with in any age.”
Source: There Will Be Time (1972), Chapter 9 (p. 97)

Source: The Postmodern Condition: A Report on Knowledge (1977), p.3

Page 17
Other writings, The Nature of the Judicial Process (1921)

Address at the Convocation of the University of Manitoba, October 28, 1952
Speaking Of Canada - (1959)