The book Tracking the Jews analyzes the beliefs, ideas, concepts, arguments, and policies of an unprecedented evangelization initiative in the years before, during, and after the Holocaust. From the ruins of the First World War to the ashes of the Second World War, it reconstructs the previously unknown relationships between a Protestant framework of global evangelical mission to the Jews, the network of international organizations that composed the ecumenical movement of the early twentieth century, and the currents of thought regarding the Jewish question. Based on more than 20,000 pages of archival documents, it brings to light issues of evangelization rooted in nineteen centuries of negative Church teachings about the Jews, revealing an area of shared beliefs about the position, role, and fate of the Jews in global society. It highlights the contradictory methods by which a broad international tolerance of traditional anti-Jewish attitude allowed, under the banner of Christian compassion, an international public discussion of anti-Semitic ideas disguised in the language of evangelization.