'An insightful and provocative look at the evolving definition of resource sustainability, encompassing diverse resource uses, and essential ecosystem services along with commodity production. Its review of past trends and the current conditions of America‘s natural resources clearly illustrates the accelerating pace of change, and the growing challenge this poses for scientists and resource managers alike.' V. Alaric Sample, President, Pinchot Institute for Conservation'Emphasizes the critical role that resource stocks play in sustaining biodiversity, supporting ecosystem health and, more generally, providing valuable services we seldom see transacted in markets. Recommended for students, researchers and those charged with managing our nation‘s natural resources.' Robert T. Deacon, University of California, Santa Barbara'A valuable update both on the condition of resources and the evolving concepts of sustainability underlying their management.' Robert Repetto, Yale School of Forestry and Environmental Studies