Professor Thomas Dixon is among several emotions researchers from different disciplines offering their responses  to an important new article by the psychologist Agnes Moors in the latest issue of Psychological Inquiry. Moors argues that “the emotions” fail to constitute a coherent and scientifically meaningful domain, and puts forward a new sceptical theory. Dixon’s response finds parallels to Moors’s arguments in earlier philosophical theories, and especially in the debate in the eighteenth and nineteenth centuries about whether emotions were more like chemical compounds or physical aggregates.