“…Lincoln Fishpool drew my attention to the book by Steinbeck and the passage from Robbins. Permission to quote Hardin (1968) kindly came from Science , Leopold (1966) from Oxford University Press, Inc., Oates (1998) Collar, 1986Collar, , 1988Collar, , 1996. I warmly acknowledge the comments of three referees, of whom one wanted this paper to be published without change, while two proposed substantial revision to encompass many missed references and deeper levels of argument.…”