 Nietzsche sums up the idea well in the preface to On the Genealogy of Morality (hereafter simply “Genealogy” or “GM”): “our thoughts, values, every ‘yes,’ ‘no,’ ‘if’ and ‘but’ grow from us with the same inevitability as fruits borne on the tree — all related and each with an affinity to each, and evidence of one will, one health, one earth, one sun” (GM P:2). Nietzsche seeks to understand in naturalistic terms the type of “person” who would necessarily bear such ideas and values, just as one might come to understand things about a type of tree by knowing its fruits. And just as natural facts about the tree explain the fruit it bears, so too type-facts about a person will explain his values and actions. 