The word ecology, coined by the German biologist and philosopher Ernst Haeckel (initially as oecology) in 1866. derives from the Greek oikos, "referring originally to the family household and its daily operations and maintenance." The term ecology is therefore intended to refer to the study of the conditions of existence that pertain to, and the interactions between, all the entities that make up our larger, cosmic household here upon earth.

Toward a Transpersonal Ecology: Developing New Foundations for Environmentalism (ed. SUNY Press, 1990) - ISBN: 9780791427750