ONE OF THE M O S T famous and influential books ever published on resources and the human prospect appeared in 1963. In Scarcity and Growth, Howard J. Barnett and Chandler Morse interpreted the extensive data assembled by their colleagues Neal Potter and T. Francis Christy Jr. in another seminal work, Trends in Natural Resource Commodities (1962). From those data Barnett and Morse made a compelling case that resource scarcity did not yet, probably would not soon, and conceivably might not ever, halt economic growth.