In his lifetime, French philosopher Jacques Maritain (1882–1973) achieved a reputation as both a leading Catholic intellectual and as an outspoken critic of antisemitism. Here historian Richard Francis Crane traces the development of Maritain’s opposition toward antisemitism and analyzes the Catholic appreciation of Judaism that animated his stance. Crane probes the writings and teachings of Maritain—from before, during, and after the Holocaust—and illuminates how his ideas altered Christian perceptions of Jews and Judaism during his lifetime and continue to do so today.