L. Theunissen

To treat some human beings as less worthy of concern and respect than others is to lose sight of their humanity. But what does this moral blindness amount to? In exploring the value of humanity, the essays in this volume offer a wide range of competing, yet overlapping, answers to this question. Some essays examine influential views in the history of Western philosophy. In others, philosophers currently working in ethics develop and defend their own views. Some essays appeal to distinctively human capacities. Others argue that our obligations to one another are ultimately grounded in self-interest or certain shared interests or our natural sociability. The philosophers featured here disagree about whether the value of human beings depends on the value of anything else. They disagree about how reason and rationality relate to this value, and even about whether we can reason our way to discovering it. This rich selection of proposals encourages us to rethink some of our own deepest assumptions about the moral significance of being human.

There is an argument according to which there must be something nonrelationally valuable for anything to be of value. The chains of dependence between values must come to an end, and humanity meets the specifications. I explore alternatives to terminating a regress in nonrelational value and give reason to reject the “borrowing” conception of relational value that drives the argument. I doubt that the nonrelational value of humanity can be secured by an argument from the structure of value, but I am optimistic about the prospects for explaining our value relationally and give reason to favor a reflexive relational model.

A definitive feature of Kant's moral philosophy is its rationalism. Kant insists that moral theory, at least at its foundation, cannot take account of empirical facts about human beings and their circumstances in the world. This is the core of Kant's commitment to ‘metaphysics of morals’, and it is what he sees as his greatest contribution to moral philosophy. The paper clarifies what it means to be committed to metaphysics of morals, why Kant is committed to it, and where he thinks empirical considerations may enter moral theory. The paper examines recent work of contemporary Kantians who argue that there is a central role for empirical considerations in Kant's moral theory. Either these theorists interpret Kant himself as permitting empirical considerations to enter, or they propose to extend Kant's theory so as to allow them to enter. With some qualifications, I argue that these interpretive trends are not supported by the texts, and that the proposed extensions are not plausibly Kantian. Kant's insistence on the exclusion of empirical considerations from the foundations of moral theory is not an incidental feature of his thought which might be modified while the rest remains unchanged. Rather, it is the very centre of his endeavours in moral philosophy. If we disagree with it, I argue, we have grounds for moving to a distinctly different theoretical framework