Each new generation born is in effect an invasion of civilization by little barbarians, who must be civilized before it is too late.

p. Applied Economics: Thinking Beyond Stage One ISBN 0-465-08143-6
2002. ISBN 978-0-300-10775-3.

He is the author of more than 30 books. He dropped out of high school and served in the United States Marine Corps during the Korean War. Since 1980 he has worked at the Hoover Institution at Stanford University.