In Chapter 16, “The Nature of Animality,” Michael Lundblad explores how questions of animal (and human) nature animate the contemporary interdisciplinary fields of posthumanism, multispecies ethnography, science and technology studies, animality studies, and human-animal studies. The chapter examines how animality has long defined how humans think about each other and how rejecting a fundamental distinction between humans and animals enables us to see the intertwined “becomings” of different beings. The chapter constructs a genealogy of prominent theoretical responses to questions about animals and animality by Jacques Derrida, Erica Fudge, and Donna Haraway, among others. Theories of animality, Lundblad demonstrates, challenge how we think about history, periodization, and culture, and breathe new life into old debates within literary studies such as questions of agency, character, and perspective.