The document classifies environmental philosophies into three main categories: ecocentrism, which views nature as central to humanity; anthropocentrism, which believes humans must sustainably manage the global system; and technocentrism, which thinks technological solutions can address environmental issues. Within ecocentrism are deep ecologists and soft ecologists. Anthropocentrism includes environmental managers. Technocentrism contains cornucopians who think resources and growth can continue indefinitely.