 The next four subsections consider these questions in turn. Before turning to these questions, it is worth briefly highlighting a different issue: which class of supervening properties to focus on? A survey of the literature provides a variety of suggestions: relevant supervening properties are characterized as ethical, moral, evaluative, or normative. The nature of each of these categories, and the relationship between them, are both controversial. For example, some philosophers will question the normative authority of morality, while others will think of normativity as a very broad tent, including any rule- or convention-governed activity, such as chess or etiquette. This entry will not explore these interesting issues (see Baker 2017 for discussion). Instead, it will provisionally assume that the significance of supervenience is similar for each of these classes of properties. For the sake of uniformity, the entry will focus on ethical properties throughout.