This dissertation argues in part that because the ethical theory of sentimentalism is based on the mistaken belief that emotions are non-cognitive, sentimentalism cannot account for the fact of the influence of cognition in morality and moral action. Therefore sentimentalism is of little use in ethics. This work is done by going back to examine Western thinking on the emotions from its dawn in Homer\u27s writing through to contemporary philosophy and neurophysiology on the emotions. Following the development of the way emotions were thought of and how they related to ethics allows the identification of an intellectual forked path brought about by Stoic thinking on emotions and morality and calcified by the work of Ren퀌 Descartes on the emot...