Table of contents : V. 1. Part 1: Reasons. Normative concepts Objective theories Subjective theories Further arguments Rationality Morality Moral concepts -- Part 2: Principles. Possible consent Merely as a means Respect and value Free will and desert -- Part 3: Theories. Universal laws What if everyone did that? Impartiality Contractualism Consequentialism -- Conclusions -- Appendices. A. Stage-given reasons B. Rational irrationality and Gauthier's theory C. Deontic reasons -- v. 2. Part 4: Commentaries. Hiking the range / Susan Wolf Humanity as an end in itself / Allen Wood A mismatch of methods / Barbara Herman How I an not a Kantian / T. M. Scanlon -- Part 5: Responses. On hiking the range On humanity as an end in itself On a mismatch of methods How the numbers count Scanlonian contractualism The triple theory -- Part 6: Normativity. Analytical naturalism and subjectivism Non-analytical naturalism The triviality objection Naturalism and nihilism Non-cognitivism and quasi-realism Normativity and truth Normative truths Metaphysics Epistemology Rationalism Agreement Nietzsche What matters most -- Appendices. D. Why anything? Why this? E. The fair warning view F. Some of Kant's arguments for his formula of universal law G. Kant's claim about the good H. Autonomy and categorical imperatives I. Kant's motivational argument J. On what there is.