Challenging traditional accounts of the development of American private law, Peter Karsten offers an important new perspective on the making of the rules of common law and equity in nineteenth-century courts. The central story of that era, he finds, was a struggle between a jurisprudence of the head, which adhered strongly to English precedent, and a jurisprudence of the heart, a humane concern for the rights of parties rendered weak by inequitable rules and a willingness to create exceptions or altogether new rules on their behalf. Karsten first documents the tendency of jurists,...