 This pre-history of “biodiversity” thus considered multiple values for humanity from living variation itself, building on the even-longer history of basic awareness that there lots of kinds of things (e.g., species; for review, see Oksanen 2004). This argumentation also added to discussions that had considered attribution of “intrinsic value” to variety of life (see the supplement on  biodiversity preservation  in the entry on environmental ethics, for discussion of intrinsic value.