 The relationship between musical and ethical values (as opposed to musical examples of more general ethical concerns, such as cultural appropriation) is an area ripe for investigation. Extant work includes Higgins 1991; Scruton 1997: 457–508; Gracyk 2007: 153–90; Hagberg 2008; Kivy 2008; Maus 2011; and Levinson 2013b.