The National Catholic Bioethics Quarterly, published by the National Catholic Bioethics Center, has just put out a special issue on the theme “Critiques of the New Natural Law Theory.” You can find the issue online here. My essay “The Role of Nature in Sexual Ethics” appears in the issue. It is an excerpt from a longer article to be published in a forthcoming volume from the NCBC. (As I indicate in the essay, many topics not addressed there, including responses to various objections, are dealt with in the forthcoming longer article, which is the most detailed and systematic thing I’ve written on the topic of sexual morality.)