In this groundbreaking work, philosopher Christine Korsgaard challenges the traditional Kantian view that animals, as irrational beings, lie outside the scope of moral concern. 
Redefining the nature of both humans and animals, she argues for the inclusion of non-human animals within the moral community—on Kantian grounds. 
With clarity and rigor, Korsgaard defends the idea that our moral obligations to animals are real, even if complex, and insists that the difficulty of these obligations is no excuse for inaction.