New Books in Diplomatic History

Constructing a Renaissance Pope: Rhetoric, Ceremony, and Authority in the Age of Leo X (1513-1521) (Oxford University Press, 2026) by Dr. Elizabeth McCahill examines the rhetoric and ceremony of the papal court during the pontificate of Pope Leo X (1513-1521).
The son of Lorenzo de' Medici, Leo has been celebrated for bringing a Golden Age of cultural efflorescence to Renaissance Rome, but he has also been excoriated for the prodigality, nepotism, and corruption that provoked Martin Luther first to criticize and then to split from the church. This study does not focus on Leo as a historical individual but analyses the collaborative efforts of curial officials, humanists, and ceremonial experts to construct his image. Although personal loyalty and private self-interest motivated these bureaucrats and scholars, so too did commitment to a traditional vision of papal authority, a vision facing new challenges in an era of rapid spiritual, social, and political change.
Weaving together material from the diaries and manuals of Paris de' Grassi, the papal Master of Ceremonies, and a variety of letters, orations, and other humanist texts, the book situates papal image-making techniques within the broader context of Renaissance culture. It argues that the scripted rites and Ciceronian rhetoric on which the papal court spent so much time and money served as tools of persuasion, creating a rarefied arena in which power, hierarchy, and tradition were continually enacted and negotiated. By embedding curial activities within the geopolitical and cultural landscape of early sixteenth-century Europe, the book illuminates the tension between the mystique of traditional authority and the new technologies, political norms, and religious dissent that conspired to destabilize the papal role.
This interview was conducted by Dr. Miranda Melcher whose book focuses on post-conflict military integration, understanding treaty negotiation and implementation in civil war contexts, with qualitative analysis of the Angolan and Mozambican civil wars. You can find Miranda’s interviews on New Books with Miranda Melcher, wherever you get your podcasts.

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The War on Terror remained an enduring feature of American foreign policy for over two decades. The War on Terror(Agenda Publishing, 2025), by Professors Andrew Thomson and Rubrick Biegon, positions the War on Terror within the broader context of Cold War interventionism and the rise of various transnational threats to American (and global) security during the late twentieth century. It introduces readers to the main concepts, debates and theories which have been used to understand and make sense of the War on Terror. These include approaches that frame it as a disparate set of policies aimed at reducing the risk of terrorist attacks against American citizens at both home and aboard; as part of a project aimed at helping maintain the United States' dominant position within international politics; and as an idea intimately bound up with perceptions of American national identity and America's place in the world. In this way, the book aims to show how the War on Terror has changed global politics, as well as why it has been fought and proven so difficult to end despite multiple failed attempts at course correction. The book, published in 2025 and now available from University of Edinburgh Press, is ideally suited for courses on international security, American foreign policy and contemporary world politics.
Rubrick Biegon is Lecturer in International Relations at the University of Kent. Co-author Andrew Thomson, reader in peace and conflict studies at Queens University Belfast, joined historian and U.S. army veteran Jacob Hagstrom in a discussion about the book's major themes, sources, and theoretical underpinnings.
Jacob Hagstrom is a military historian and author of America's Favorite Warlord (Pen and Sword, 2026)

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Romania, the Little Entente and the Struggle for Europe (Bloomsbury, 2026) is the first in-depth, English-language study of Romania's role in the Little Entente-an alliance formed with Czechoslovakia and Yugoslavia to defend the territorial status quo in Central and Eastern Europe after the First World War. While this alliance has often been dismissed in international historiography as peripheral, this book argues that the Little Entente was a critical, albeit fragile, experiment in regional security and interwar diplomacy. Anchored in Romania's foreign policy, it reinterprets the alliance as a revealing case study in small-state agency, collective security, and the entropic pressures of the post-war order. Whilst drawing on a wide range of Romanian diplomatic archives, press materials, and memoirs, many of which remain underutilized in anglophone scholarship, Grey also situates Romania's actions within the larger European context, assessing how regional alliances engaged with the League of Nations and evolving relationships with France, Germany, Italy, and Soviet Russia. Romania, the Little Entente and the Struggle for Europe moves beyond simplistic narratives of failure and instead presents a nuanced portrait of the Little Entente as a fragile, flawed, but earnest effort to secure peace in a precarious international order-one whose lessons resonate powerfully today.

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From the mid-seventeenth to early eighteenth century, a wide network of English-speaking men, women, and children took up residence in the Ottoman Maghrebi regencies of Algiers, Tunis, and Tripoli. There they formed expatriate communities, engaged with the societies around them, and undertook their businesses, from trading to captivity redemption to international politics.

Moving beyond official diplomatic records and printed texts, Britain and the Ottoman Maghreb, 1662–1712: Merchants, Consuls, and Cultural Exchange (Oxford University Press, 2026) by Dr. Nat Cutter delves into thousands of personal letters and financial records, where we find friendship, conflict, adoration, derision, manipulation, and scandal across cultures and countries. In so doing, it offers new ways of thinking about British-Maghrebi relations in a transitional age for global trade and military-naval power, moving beyond plaintive consular complaints, gunboat diplomacy, and brutal captivity to accommodate positive cooperation and mutual benefit.

These expatriates became embedded mediators, hybridised European and Ottoman cultural forms, and experienced distanciation from both homeland and hostland to enjoy and manipulate both. For them, Algiers, Tunis, and Tripoli were not solely sites for danger or exploitation but, as peace was progressively established with each regency, increasingly places for pragmatic cooperation, personal and professional advancement, commercial success, and enjoyment.

Expansive networks of correspondence and cooperation around the Maghreb, Mediterranean, and Britain embedded the expatriates in a cross-cultural trade in material goods and information and allowed them to manipulate the course of trade and diplomacy between Britain and the Maghreb. The expatriates were less marginal, miserable, and misbehaving Britons and more embedded, canny, Mediterranean actors.
Nat Cutter, Mary Lugton Postdoctoral Fellow and Assistant Lecturer in History, University of Melbourne
This interview was conducted by Dr. Miranda Melcher whose book focuses on post-conflict military integration, understanding treaty negotiation and implementation in civil war contexts, with qualitative analysis of the Angolan and Mozambican civil wars. You can find Miranda’s interviews on New Books with Miranda Melcher, wherever you get your podcasts.

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Conceived in 1950, the Colombo Plan for Co-operative Development in South and Southeast Asia was a unique experiment in foreign relations. Meeting annually across what we now know as the 'Indo-Pacific', talented administrators facilitated foreign aid provision, and promoted development fuelled state-making, internationalism and experimental regionalism across postwar Asia. 
In The Colombo Plan: Development Internationalism in Cold War Asia (Cambridge UP, 2025), Professor David Lowe argues that this new setting and dynamic international cast created an unusually productive diplomatic environment of development internationalism. The Colombo Plan did not escape power politics or Cold War divisions. However, it did run according to its own rhythm, and, unlike other experiments, it endured, continuing today in much reduced form.
This interview was conducted by Dr. Miranda Melcher whose book focuses on post-conflict military integration, understanding treaty negotiation and implementation in civil war contexts, with qualitative analysis of the Angolan and Mozambican civil wars. You can find Miranda’s interviews on New Books with Miranda Melcher, wherever you get your podcasts.

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