Abstract

The eighteenth century debate between moral rationalists and moral sentimentalists has seen a striking renaissance in the past decades, not least because of research into the nature of moral judgement conducted by empirical scientists such as social and developmental psychologists and neuroscientists. A claim that is often made in the current discussion is that the evidence made available by such empirical investigations refutes rationalist conceptions of moral judgement and vindicates the views of Hume or other moral sentimentalists. For example, Jesse Prinz and Hanno Sauer have recently argued that the available data demonstrates that emotions are both necessary and sufficient for moral judgement and that the best or the only way to make sense of these findings is to conclude that moral judgements are constituted by emotions. The aim of this paper is to thoroughly examine this argument and the underlying empirical evidence and to show that there is currently no compelling evidence for the truth of either the necessity or the sufficiency thesis and that, even if both theses were true, they would fail to provide a sound basis for a plausible sentimentalist constitution claim.