This series of essays examines the underlying historical, cultural, & philosophical issues that undermine the sustainability of natural resources & proposes alternative approaches to conservation. These approaches emphasize the relations among populations rather than among individuals; the integrity of the whole ecosystems across longer time frames; the importance of qualitative as well as quantitative indicators of human welfare & sustainability; & the unpredictable & interdependent interaction among natural,Ó scientific, & regulatory processes. Charts & tables.