Yet, there remains a glaring lacuna for all the discussion of drive theory in the scholarship. The secondary literature is delinquent in explaining how animal drives became incorporated to form the human psyche. Nietzsche’s account to elucidate how drives became “digested” or in his words “inpsychated” is called the Internalization Hypothesis. However, as it appears in GM: II, 16, the hypothesis is grossly inchoate. The result of this undertheorization is manifold; its deleterious effects resonate along many axes of Nietzsche’s philosophy. The present book, offers an original and fruitful interpretation of Nietzsche’s philosophical psychology. First, it clarifies what drives are. Second, it provides a new way of thinking about Nietzsche’s genealogical methods and then applies these insights to . What follows is a work that not only sheds much-needed light on Nietzsche’s philosophy of mind in general and his theory of emotions in particular, but also informs and illuminates problematic passages of Nietzsche’s