• Duties to endangered species (BioScience) 

        Author(s):Rolston, Holmes, 1932-
        Date Issued:1985
        Format:born digital; articles
        Neither scientists nor ethicists have realized how concern for endangered species requires an unprecedented mix of biology and ethics. The usual approach says that there are only duties to other persons concerning species. ...
      • Valuing wildlands 

        Author(s):Rolston, Holmes, 1932-
        Date Issued:1985
        Format:born digital; articles
        Valuing wildlands is complex. (1) In a philosophically oriented analysis, I distinguish seven meaning levels of value, individual preference, market price, individual good, social preference, social good, organismic, and ...