This article sketches an intellectual history of the distinction between Christian theology and Christian ethics. The twists and turns of that history have been obscured by a recent tendency to deny the distinction's usefulness, as part of a wider strategy for reasserting theology's relevance to modern social problems. By contrast, earlier theologians assumed the value of the theology/ethics divide, interpreting it through Aristotelian, neo-Kantian, and finally Marxist categories. The distinction fell into disrepute because theologians struggled to maintain the distinction consistently (...) and disagreed on the concerns implicated by it, variously using it to affirm the moral subject's agency, the divine/human difference, or the complexity of real people's circumstances. Nonetheless, the distinction has persisted as a useful shorthand for recognizing the limitations of Christian theology, qua a conceptual discourse, in fully apprehending its subject matter of the Christian life. (shrink)