The thesis [of this work] is , as the title alludes, that morality is ultimately relativisits- that right and wrong are not absolutes but are considerably flexible- and variable in different societies at all times. Although he qualifies his views as opinions rather than facts and asks his readers to examine his premises critically before agreeing with his views, Nietzsche leaves no doubt that he is confident that all previous philosophers were wrong about important precepts and he alone is right. -- From back cover.