Against the reason holists (e.g. Dancy 2014), it has been contended by many reason atomists that while many features might well change their reason statuses or valences in different contexts in the way suggested by reason holists, they are merely secondary rather than primary reasons. In these atomists’ scheme of things, there are features that function as primary reasons whose reason statuses remain invariant across contexts. Moreover, these features provide the ultimate source of explanations for why some features, qua secondary (...) reasons, are variable in their reason statuses. Against the background of reason holism, this two-level picture of moral reason has been highly influential as an alternative theory of how moral reasons behave, and has been championed by several eminent philosophers such as Roger Crisp, Brad Hooker, David McNaughton and Piers Rawling. Call this theory ‘primary reason atomism’ (or PRA). Since its advancement, it has been met with lots of challenges, yet most, if not all, of these challenges remain unaddressed, insofar as I could see. This article will pick up the slack, and argues that none of its existing powerful criticisms works that can be derived from Swanton’s target-center view of the virtues, Stangl’s virtue variabilism, Dancy’s bottom-up holism, and coverage challenge, McKeever & Ridge, and Väyrynen’s double-counting objection, and Scanlon’s buck-passing account of values. This may not prove PRA to be right, but at least shows PRA to be a serious contender for the right theory of how moral reason behaves. (shrink)