In this brief but insightful volume, the author presents and defends a version of ethical realism that he calls practical realism. Asserting that "moral claims are literally true or false and that their truth-values depend upon the facts", Jacobs argues that these facts are prescriptive for practical reasoners through the human capacity of practical reasoning. "My purpose is to explicate and illustrate how reason in its practical employment can understand the ethical significance of facts about human nature and social life.... (...) My main claim is that practical reasoning can achieve a substantive understanding of the ethical significance of facts and that this understanding can be action-guiding". (shrink)