There has been a lamentable trend, in the age since the Great Awakenings, to use the word “piety” as a synonym for “devoutness.” Piety, to the contemporary ear, conjures a sense of personal religious feeling and practice. For example, Saba Mahmood's distinguished text, Politics of Piety, has as its theme the individual agency of women in Islamic societies. Meanwhile, untold books in the field of religious studies simply use “piety” as a stand-in for “religion.”2 This use of the term is not limited to the academic study of religion; recently, one liberation theologian has even demanded that we move, in the words of the title of his book, Beyond Piety.3 The thesis of that book rests on the premise that piety is altogether private, and insufficiently materially productive.4
According to the ancients, though, piety is neither of these things. Piety, for Cicero, motivates the pious...