 Most of the detailed engagement with loyalty has come from creative writers (Aeschylus, 2003; Galsworthy, 1922; Conrad, 1899, 1907, 1913), business and marketing scholars (Goman, 1990; Jacoby &amp; Chestnut, 1978), psychologists (Zdaniuk &amp; Levine, 2001), psychiatrists (Böszörményi-Nagy, 1973), sociologists (Connor, 2007), scholars of religion (Sakenfeld, 1985; Spiegel, 1965), political economists (Hirschman, 1970, 1974), and—pre-eminently—political theorists who took a particular interest in nationalism, patriotism and loyalty oaths (Grodzins, 1956; Schaar, 1957; Guetzkow, 1955). Because of its focus on familial relations, Confucian thought has long been interested in loyalty (Goldin, 2008; see also the section on   Filiality and Care   in the entry on Chinese Ethics for more on loyalty and related debates in Confucian and Mohist ethics). The grand Western philosophical exception has been Josiah Royce (1908, 1913), who, influenced by eastern philosophy (Foust, 2012b, 2015), created an ethical theory centering on “loyalty to loyalty.” Royce has generated a steady but specialized interest (see, esp. Foust, 2012a, 2011, forthcoming). Since the 1980s, though, some independent philosophical discussion has begun to emerge (Baron, 1984; Fletcher, 1993; Oldenquist, 1982; MacIntyre, 1984; Nuyen, 1999; Keller, 2007; Jollimore, 2012; Felten, 2012; Kleinig, 2014), not only generally and in the context of political theory, but also in the areas of occupational and professional ethics (McChrystal, 1992, 1998; Trotter, 1997; Hajdin, 2005; Hart &amp; Thompson, 2007; Schrag, 2001; Coleman, 2009; Foust, 2018), whistleblowing (Martin, 1992; Varelius, 2009), friendship (Bennett, 2004), and virtue theory (Ewin, 1992).