"I thank the National Science Foundation for regularly rejecting my (honest) grant applications for work on real organisms (cf. Szent-Gyorgyi, 1972), thus forcing me into theoretical work."Apparently he was a bitter person. You can check out the source of the Red Queen Hypothesis HERE.
You can also check out all of the previous Geological Literature Quotes at my newly redesigned website page.
van Valen, L., 1973, A new evolutionary law: Evolutionary Theory, v. 1, p. 1-30.