More quotes by Marshall McLuhan

"Ads are the cave art of the twentieth century."
"Great art speaks a language which every intelligent person can understand. The people who call themselves modernists today speak a different language."
"Advertising is the greatest art form of the 20th century."
"I think of art, at its most significant, as a DEW line, a Distant Early Warning system that can always be relied on to tell the old culture what is beginning to happen to it."