This dissertation is an investigation into the ground of moral objectivity. My preliminary claim is that in order to be objective, moral properties must be real properties. The following question is, what kind of (real) properties are moral properties? A number of recent philosophers have argued that moral properties are natural properties. \u27\u27Natural in this context means (completely) open to investigation and discovery by the senses or by empirical science. The natural properties proposed in the recent literature are connected to the property of human well-being. The main project of my dissertation is to show that natural properties are not adequate as the foundation for moral objectivity, because there is no necessary connection ...