 Although contemporary philosophers have been divided with respect to Mackie’s moral skepticism, they have mostly agreed in rejecting his extremely strong claims about what moral motivation, and the objective moral properties that figure in our moral judgments, would have to be like. They have uniformly rejected the suggestion that a grasp of morality’s requirements would produce overriding motivation to act accordingly. And most have rejected efforts to explain moral motivation by appealing to a motivating power emanating from moral properties and the acts and states of affairs that instantiate them. One partial exception to this last claim may be worth noting. Christine Korsgaard (1996) has endorsed the idea of something like objectively prescriptive entities, though these entities are not, in her view, moral properties. Korsgaard shares Mackie’s skepticism about objective values of the sort he describes as figuring in the moral realist views of philosophers like Plato. Nevertheless, she observes, Mackie is wrong and the realist is right with respect to whether any extant entities can meet the dual criteria of providing the agent who knows of them with “both a direction and a motive.” It is, she insists, “the most familiar fact of human life that the world contains entities that can tell us what to do and make us do it. They are people, and the others animals” (Korsgaard 1996, 166). Most philosophers, even those sympathetic to Kant’s moral philosophy and to Korsgaard’s brand of Kantianism, find the idea that people (and non-human animals) have value and can in that regard “tell us what to do” and “make us do it” rather elusive. But Korsgaard’s claims are part of a large, extremely rich picture of ethics that cannot be explored here, and a fair assessment of her claims would require attention to this larger picture. The important point, for present purposes, is that at least some philosophers, Korsgaard, and perhaps others drawn to ideas deriving from Kant’s moral philosophy, retain some attraction to the idea that moral motivation and normativity find their source in inherently normative or “objectively prescriptive” entities.