New Books in Diplomatic History

In 1806, when Meriwether Lewis and William Clark return from their
journey—having led the Corps of Discovery across eight thousand miles of rapids, mountains, forests, and ravines—they bring an incredible tale starring themselves as courageous explorers, skilled survivalists, underrated scientists, and peaceful ambassadors. While there is truth in those descriptions, there is also distortion.

From one of the most exciting new historians to emerge in the past decade, This Vast Enterprise: A New History of Lewis & Clark (Simon & Schuster, 2026) offers a novel take on the expedition: a gripping narrative that draws on lost documents, stunning analysis, and Native perspectives. Craig Fehrman spent five years visiting more than thirty archives, interviewing more than a hundred sources, and collecting oral history passed down over centuries. He came to see that the success of Lewis and Clark depended on much more than just Lewis and Clark. We all know Sacajawea, and some of us know York, the Black man Clark enslaved. But here we meet John Ordway, a working-class soldier who fought grizzlies and towed the captains’ hulking barge. We hear from Wolf Calf, a Blackfoot teenager
who watched his friend die in a battle with Lewis and his men.

Each chapter moves to a different person’s point of view, describing
their desires and contradictions. We see Thomas Jefferson operating in an age of bitter partisan unrest—his secret political maneuvers to fund the expedition, revealed here for the first time, are a case study in presidential power. We witness the strategy and strength of Black
Buffalo, completely upending our understanding of Lakota-American
diplomacy. York, in his chapters, finds ways to wield power and make
choices in an era that didn’t allow him much of either. Clark is not a
folksy Kentuckian but a student of the Enlightenment. (Fehrman
discovered his college notebook; no previous biographer even realized that he went to college.) Lewis is someone willing to sacrifice everything for his country and his mentor, Jefferson.

In the end, the captains are men who needed help—from Sacajawea, from the Corps, and from each other. Mile after mile, the expedition pushes on through hailstorms and flash floods, frostbite and infections, rattlesnakes and rabid wolves, with the Spanish cavalry in fierce pursuit. Fehrman balances the story’s adventure with the humanity of its protagonists. The result is a thrilling reminder that even the most familiar moments in history can still surprise us.

Craig Fehrman is a journalist and historian. He lives in Indiana with his wife and children.

Raymond Williams, PhD is a political scientist, blogger, and book
club administrator with an interest in American History and Politics.
You can find Raymond on Instagram, Threads, and Twitter at @rtwilliams16
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As the First World War came to a chaotic end, Europeans feared that a wave of crime and anarchy would sweep across their continent. The upheavals of the war and of the subsequent violent breakup of the Habsburg, German, and Ottoman empires magnified longstanding fears that an increasingly interconnected world offered the enterprising and unscrupulous new opportunities to break the law and evade capture. New kinds of international criminals and criminal enterprises demanded novel forms of international cooperation. Thus was born the International Criminal Police Commission, known today as Interpol. In the 1920s and 1930s, Interpol's police officials and the lawyers who collaborated with them created lasting programs to combat counterfeiting, sex and drug trafficking, terrorism, and human smuggling, and other forms of international crime, which they labelled "a scourge of humanity."

Drawing on press reports, police files, and criminal records in numerous languages and across multiple countries, in A Scourge of Humanity: The Origins of Interpol and the End of Empire in Central and Eastern Europe (Oxford University Press, 2025), Dr. David Petruccelli explores the origins of Interpol and the role Central and Eastern European actors played in developing criminal policing and law during the interwar period to bring stability to their region and reshape international institutions and norms. He shows how legal experts replaced a liberal focus on individual rights with an emphasis on a collective of international societies and of police officers who looked to the international sphere as a space for eluding the constraints of the rule of law at home. In doing so, their initiatives posed an alternative to the imperial and liberal internationalist programs pursued by many Western Europeans and Americans and laid the groundwork for more radical forms of persecution during the Second World War.

While bringing to life the stories of individuals involved in shady activities across borders, A Scourge of Humanity explores the vigorous policing and harsh criminal laws established by Interpol to combat their crimes and highlights illiberal forms of internationalism that have left a lasting mark on our world.

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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After Barbary: Algeria's Roles in the French and American Empires (Cornell University Press, 2025) by Dr. Timothy Mason Roberts explores the connection between the United States and North Africa between the Barbary Wars of the early nineteenth century and the era of European decolonization after World War II. Dr. Roberts offers a new approach to the study of empires, highlighting the significance of Algeria in French-American relations from France's first occupation of the country through the first years of independence of the Republic of Algeria.

As Dr. Roberts demonstrates, imperial authorities in Washington, DC; Paris; and Algiers rarely collaborated intentionally in institutional partnerships or alliances. Rather, American, French, and Algerian politicians, soldiers, writers, and revolutionaries—often acting at cross purposes and across political and cultural boundaries—sought power by imagining and constructing Algeria as a fissured, dynamic, transimperial space. Focusing on issues of settler colonialism, irregular warfare, racialized citizenship, territorial incorporation, and pan-African identity, After Barbary shows how French Algeria helped make the American and French empires.

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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Catastrophic Diplomacy: US Foreign Disaster Assistance in the American Century (UNC Press, 2023) offers a sweeping history of US foreign disaster assistance, highlighting its centrality to twentieth-century US foreign relations. Spanning over seventy years, from the dawn of the twentieth century to the mid-1970s, it examines how the US government, US military, and their partners in the American voluntary sector responded to major catastrophes around the world. Focusing on US responses to sudden disasters caused by earthquakes, tropical storms, and floods—crises commonly known as "natural disasters"—historian Julia F. Irwin highlights the complex and messy politics of emergency humanitarian relief.
Deftly weaving together diplomatic, environmental, military, and humanitarian histories, Irwin tracks the rise of US disaster aid as a tool of foreign policy, showing how and why the US foreign policy establishment first began contributing aid to survivors of international catastrophes. While the book focuses mainly on bilateral assistance efforts, it also assesses the broader international context in which the US government and its auxiliaries operated, situating their humanitarian responses against the aid efforts of other nations, empires, and international organizations. At its most fundamental level, Catastrophic Diplomacy demonstrates the importance of international disaster assistance—and humanitarian aid more broadly—to US foreign affairs.
Julia F. Irwin, PhD, Yale University, 2009, is professor of history at Louisiana State University. Her research focuses on the place of humanitarian aid in twentieth-century U.S. foreign relations. Her first book, Making the World Safe: The American Red Cross and a Nation’s Humanitarian Awakening (2013), is a history of U.S. international relief efforts during the World War I era; the dissertation on which it is based won the Betty M. Unterberger Dissertation Prize from the Society for Historians of American Foreign Relations.
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Jeremy Yellen’s The Greater East Asia Co-Prosperity Sphere: When Total Empire Met Total War (Cornell University Press, 2019) is a challenging transnational exploration of the Greater East Asia Co-Prosperity Sphere, Japan’s ambitious, confused, and much maligned attempt to create a new bloc order in East and Southeast Asia during World War II. Yellen’s book is welcome both as the first book-length treatment of the Sphere in English and for also being innovative in both approach and analysis. The book is divided into two parts, each addressing one of the “two Pacific Wars,” as Yellen puts it: a “war of empires” and “an anticolonial war… for independence.” The first half of the book treats the Japanese “high policy” of the Sphere. Here, Yellen not only provides—through the Coprosperity Sphere—a provocative new reading of the Tripartite Pact and the imbrication of Japan’s regional and global geopolitical strategies, but also outlines an important timeline of how Japanese conceptualizations of the Sphere evolved with the changing economic, political, and military expediencies of the Pacific War. Though ideas about the Sphere as a regional order of hierarchical solidarity with Japan at its apex, a “grand strategy of opportunism” rooted in the “sphere-of-influence diplomacy” and “cooperative imperialism” of Japan’s bombastic and enigmatic foreign minister, Matsuoka Yōsuke, Yellen shows that plans for the Sphere only became specific and concrete when Japan’s war situation descended into increasing desperation from 1942 on. The second half of the book shifts gears to examine responses to the Sphere in the Philippines and Burma. Yellen shows that for local nationalist elites like Burma’s first prime minister Ba Maw, whether Japanese rhetoric about the creation of more-or-less liberal international order within the Sphere for the top-echelon nations like Burma and the Philippines was genuine or self-serving, “even sham independence brought opportunity.” By focusing on these pragmatic nationalists (“patriotic collaborators”) Yellen contributes to a growing body of literature on empire that refuses to be pigeonholed by binaries of virtuous resistance and traitorous collaboration.
This podcast was recorded as a lecture/dialogue for a live audience at Nagoya University.
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