Beyond Good and Evil / On the Genealogy of MoralityBeyond Good and Evil is Nietzsche's first sustained philosophical treatment of issues important to him. Unlike the expository prose of the essayistic period (1872 76), the stylized forays and jabs of the aphoristic period (1878 82), and the lyrical philosophical rhetoric of the Zarathustra period (1882 85), Beyond Good and Evil inscribes itself boldly into the history of philosophy, challenging ancient and modern notions of philosophy's achievements