Allen William Wood (born October 26, 1942) is an American philosopher specializing in the work of Immanuel Kant and German Idealism, with particular interests in ethics and social philosophy. One of the world’s foremost Kant scholars, he is the Ruth Norman Halls professor of philosophy at Indiana University, Ward W. and Priscilla B. Woods Professor, Emeritus, at Stanford University, and has held professorships and visiting appointments at numerous universities in the United States and Europe. In addition to popularising and clarifying the ethical thought of Kant, Wood has also mounted arguments against the validity of trolley problems in moral philosophy.