1. An earlier version of this paper was presented at the international conference on “Religions and Violence. Ideologies, Rites, Conflicts,” organized by the Museum of Religions “Raffaele Pettazzoni” from 13–17 June 2017, in Velletri. I wish to thank the Director of the Museum, Dr. Igor Baglioni, for his tireless work in the organization of this event. My thanks also and especially go to the editors and anonymous reviewers from Studies in Late Antiquity for their valuable suggestions, which have contributed to an undoubtedly clearer and more effective presentation of my argument.
2. See, e.g., Polybius 6.56.6–12, ed. T. Büttner-Wobst, Polybii historiae, 5 vols. (Leipzig: B. G. Teubner, 1889–1905), 2:306–7; and Mucius Scaevola—whether real or fictitious—as quoted by Augustine, De civitate Dei 4.27 (Corpus Christianorum Series Latina 47:120–22). Against this explanation, see George J. Szemler, The Priests of the Roman Republic: A Study of Interactions Between Priesthoods and Magistracies (Brussels: Latomus, 1972), 193–94; Georges Dumézil, La religion romaine archaïque avec un appendice sur la religion des Étrusques, second edition (Paris: Payot, 1974), 131–38; J. H. Wolf G. Liebeschuetz, Continuity and Change in Roman Religion (Oxford: Clarendon Press, 1979), esp. 1–54; John Scheid, Les dieux, l’état et l'individu: Réflexions sur la religion civique à Rome (Paris: Seuil, 2013), 35–41, 81–93.
3. On these features of ancient historiography, see Arnaldo Momigliano, “Popular Religious Belief and the Late Roman Historians,” Studies in Church History 8 (1972): 1–18.
4. See Ernst-Wolfgang Böckenförde, “Die Entstehung des Staates als Vorgang der Säkularisation,” in Säkularisation und Utopie. Ebracher Studien. Ernst Forsthoff zum 65. Geburtstag (Stuttgart, Berlin, Köln and Mainz: W. Kohlhammer Verlag, 1967), 75–94. The nature and extent of the so-called secularization, however, are the subject of diverging interpretations: see Philip S. Gorski, “Historicizing the Secularization Debate: Church, State, and Society in Late Medieval and Early Modern Europe, ca. 1300 to 1700,” American Sociological Review 65 (2000): 138–67.
5. See Bruce Lincoln, Holy Terrors: Thinking about Religion after September 11, second edition (Chicago and London: The University of Chicago Press, 2006), 56–61.