The Pope at War

David I. Kertzer's "The Pope at War" presents a meticulously researched examination of Pope Pius XII's papacy during World War II, drawing extensively from recently opened Vatican archives. The Pulitzer Prize-winning historian delivers a compelling narrative that challenges long-held assumptions about the Catholic Church's relationship with fascist regimes in Italy and Nazi Germany during one of history's darkest periods.

The book centers on Eugenio Pacelli, who became Pope Pius XII in 1939, just as Europe stood on the brink of catastrophic war. Kertzer traces the complex web of diplomatic relationships, political calculations, and moral compromises that characterized the Vatican's wartime conduct. Through careful analysis of newly accessible documents, the author reveals the extent to which the Holy See maintained communication channels with both Mussolini's fascist government and Hitler's Nazi regime throughout the conflict.

One of the work's greatest strengths lies in its detailed documentation of the Vatican's diplomatic maneuvering. Kertzer demonstrates how the Church's hierarchy prioritized institutional preservation and the protection of Catholic interests, often at the expense of more forceful moral leadership. The narrative traces numerous instances where Vatican officials, including the Pope himself, chose silence or measured diplomacy over public condemnation of atrocities, particularly regarding the persecution and mass murder of European Jews.

The author's extensive use of primary sources, including diplomatic cables, internal Vatican correspondence, and reports from papal nuncios stationed throughout Europe, provides readers with an unprecedented window into the decision-making processes within the Holy See. These documents reveal a pattern of calculated responses to the escalating horrors of the Holocaust, with Vatican leadership consistently weighing the potential consequences of public statements against perceived threats to Church interests and Catholic populations in Axis-controlled territories.

Kertzer carefully contextualizes Pius XII's actions within the broader framework of Catholic anti-communism, which significantly influenced Vatican foreign policy. The book illustrates how fear of Soviet expansion and the spread of communism shaped the Pope's reluctance to fully break with Hitler and Mussolini, even as evidence of Nazi atrocities mounted. This anti-communist stance, the author argues, became a lens through which the Vatican viewed the entire conflict, sometimes overshadowing humanitarian concerns.

The narrative also explores the Pope's personal background and temperament, examining how Pacelli's experiences as papal nuncio in Germany during the 1920s and as Vatican Secretary of State in the 1930s shaped his worldview and diplomatic approach. Kertzer presents a portrait of a cautious, legalistic pontiff who favored traditional diplomatic channels and feared that public confrontation would prove counterproductive or endanger Catholics living under fascist rule.

The book addresses the controversial question of what the Pope knew about the Holocaust and when he knew it. Through careful examination of intelligence reports reaching the Vatican, Kertzer demonstrates that detailed information about the systematic murder of Jews was available to Church leadership relatively early in the war. The author documents how this information was received, processed, and ultimately how it influenced—or failed to influence—papal policy and public statements.

While the work is critical of Pius XII's wartime conduct, Kertzer maintains scholarly rigor throughout, avoiding simplistic judgments while letting the documentary evidence speak for itself. The author acknowledges the genuine dilemmas faced by Vatican leadership and the real constraints under which they operated, even as he questions whether different choices might have been possible and what impact more forceful moral leadership might have had.

The prose remains accessible despite the complexity of the subject matter and the density of archival material. Kertzer successfully weaves together diplomatic history, biography, and moral inquiry into a coherent narrative that maintains reader engagement while delivering substantial historical analysis. The book benefits from the author's previous work on Vatican history and Italian fascism, providing depth of context often missing from treatments of this period.

"The Pope at War" represents a significant contribution to the ongoing historical debate about the Catholic Church's role during World War II. By leveraging recently opened archives, Kertzer provides scholars and general readers alike with a more complete picture of Vatican diplomacy during this crucial period. The work stands as an important reassessment of Pius XII's papacy, grounded in documentary evidence and rigorous historical methodology, offering insights that will inform discussions about moral leadership, institutional responsibility, and the complex intersection of religion and politics during wartime.