In his writing, Gilles Deleuze drew on a vast array of source material, from philosophy and psychoanalysis to science and art. Yet scholars have largely neglected one of the intellectual currents underlying his work: Western esotericism, specifically the lineage of hermetic thought that extends from Late Antiquity into the Renaissance through the work of figures such as Iamblichus, Nicholas of Cusa, Pico della Mirandola, and Giordano Bruno. In this book, Joshua Ramey examines the extent to which Deleuze's ethics, metaphysics, and politics were informed by, and can only be fully understood...