 Biodiversity as variety provides option/investment and insurance benefits to humanity, but this leaves open the question as to the nature of the value of such benefits. Haskins (1974) had called for “an Ethic of Biotic Diversity”, in which variety’s benefit has ethical import because we care about the well-being of future generations. Similarly, when IUCN (1980: Section 3) reviewed the arguments for the conservation of biotic diversity, they linked this to moral principles: