 Reformed epistemology has been championed by Alvin Plantinga (1932–) and Nicholas Wolterstorff (1932–), among others. Reformed epistemology is “Reformed” insofar as it draws on the Reformer John Calvin (1509–1564) who claimed that persons are created with a sense of God (sensus divinitatis). While this sense of God may not be apparent due to sin, it can reliably prompt persons to believe in God and support a life of Christian faith. While this prompting may play an evidential role in terms of the experience or ostensible perception of God, it can also warrant Christian belief in the absence of evidence or argument (see K. Clark &amp; VanArragon 2011; M. Bergmann 2017; and Plantinga &amp; Bergmann 2016). In the language Plantinga introduced, belief in God may be as properly basic as our ordinary beliefs about other persons and the world. The framework of Reformed epistemology is conditional as it advances the thesis that if there is a God and if God has indeed created us with a sensus divinitatis that reliably leads us to believe (truly) that God exists, then such belief is warranted. There is a sense in which Reformed epistemology is more of a defensive strategy (offering grounds for thinking that religious belief, if true, is warranted) rather than providing a positive reason why persons who do not have (or believe they have) a sensus divinitatis should embrace Christian faith. Plantinga has argued that at least one alternative to Christian faith, secular naturalism, is deeply problematic, if not self-refuting, but this position (if cogent) has been advanced more as a reason not to be a naturalist than as a reason for being a theist. (For a stronger version of the argument that theism better accounts for the normativity of reason than alternatives, see Angus Menuge’s Agents Under Fire, 2004.)