Rolston, Holmes, 1932-, authorJones and Bartlett Publishers, publisher2007-01-032007-01-031995http://hdl.handle.net/10217/37689Includes covers and published critical notices.In the series The Jones and Bartlett Series in Philosophy.born digitalpreliminariesengCopyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.moralsvaluesnatureenvironmental ethicsbiologylifeevolutionoriginsText