New Books in Diplomatic History

In Treaty Ground: Diplomacy and the Politics of Sovereignty, from Roanoke to the Republic (U Nebraska Press, 2026), Professor Charles W. A. Prior offers a new account of the sovereign claims of Native Americans, the Crown, and colonies in early America, arguing that Native American diplomacy shaped how sovereignty was negotiated and contested among all three, from Virginia’s founding to the ratification of the U.S. Constitution. Previous scholars have focused on the contested relationship between the British imperial state and the colonies it established along the Atlantic Coast without addressing how sovereign Native nations shaped the colonial process through warfare, diplomacy, trade, peace-making, and treaty-making.

Dr. Prior adopts a new interpretive framework for examining sovereignty in early America, arguing that the Native and colonial spaces of the Northeast were a treaty ground thickly layered with agreements and negotiated rules of interaction. Drawing on an extensive range of treaty records, writings on colonial and imperial affairs, letters, and official documents, Treaty Ground argues that sovereignty was negotiated within diplomacy and shaped the norms of war, the terms of peace and alliances, the rightful ownership of territory, and appropriate responses to treaty violations. This process in turn structured relations between the Crown and colonies and framed initial positions on how the power of congress related to that of the states.

Treaty Ground offers historical depth to our understanding of how Native nations articulated Indigenous power within colonialism, cuts settler colonialism down to size, and expands contemporary understandings of the sovereign relationships between Native nations in the United States and Canada.

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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Based on a decade of research and writing, enriched by eyewitness interviews and revealing documents obtained through dozens of freedom of information requests, Kennedy’s Coup vividly recreates the Kennedy Administration’s secret encouragement of the fatal 1963 military coup against South Vietnam’s president Ngo Dinh Diem.The brutal assassination of Diem by his own generals—which capped weeks of bitter White House infighting—led to dreadful consequences for the United States, opening the door to nine years of costly and futile warfare in Vietnam. Jack Cheevers provides unforgettable portraits of the people behind this fascinating drama: the kindly, philosophy-loving American ambassador who tried to save Diem; the powerful Pentagon and State Department figures who battled for JFK’s ear; the hard-driving young American journalists in Saigon who braved police beatings and death threats to dig out the story; the adder-tongued Madame Nhu, Diem’s beautiful sister-in-law, who enraged critics with outrageous insults; the scheming South Vietnamese generals who slowly tightened a noose around their commander in chief; the hard-drinking CIA agent who carried secret US messages to the generals; and Diem and his Machiavellian brother Nhu, head of the feared secret police, who tried but failed to outwit both the Americans and their traitorous generals.While many Vietnam books mention Diem’s murder in passing, this gripping account delves into the participants’ personalities, motives, and actions in greater detail than ever before. The definitive history of one of the most catastrophic decisions ever made by a US president, shedding new light on events that altered the world, Kennedy’s Coup will be a work of lasting importance.

Luca Trenta is an Associate Professor in International Relations at Swansea University, in Wales (UK).
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Stephen Sims’ New Atlantis essay examines how emerging technologies are reshaping the structure and authority of the modern nation-state. He argues that innovations such as artificial intelligence, drones, and networked warfare are weakening the traditional link between territorial control and the projection of power, enabling smaller actors to operate with unprecedented reach. At the same time, advanced states are enhancing their internal capabilities through data-driven governance and automation, increasing their ability to monitor and manage populations. This dynamic creates a paradox in which states grow more powerful domestically while becoming more vulnerable externally. Sims contends that sovereignty is fragmenting, with authority dispersing both to non-state actors and to transnational technological systems. The result is not the end of the nation-state, but its evolution into a more contested, uneven, and technologically mediated form.

Stephen Sims is associate professor of political science at the Rochester Institute of Technology.

Greg is the Executive Director and Founder of the World War II Discussion Forum (wwiidf.org). He also has a strong interest in literature, culture, religion, science and philosophy (translation: he's an eclectic reader who is constantly missing deadlines for book reviews).
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In the wake of the September 11 attacks, US officials identified the so-called battle for hearts and minds as the “second front” in the war on terror. A wave of funding flowed into public diplomacy in the Middle East, seeking to change views of the United States through Arabic-language communications—often while hiding the traces of American origins. To what extent did this vast propaganda apparatus sway Arab public opinion? Which ideas and actors shaped American public diplomacy in this period? What are the lessons for information strategy today?

The Long War of Ideas: American Public Diplomacy in Arabic After 9/11 (Columbia University Press, 2026) by Dr. Nathaniel Greenberg tells the story of American propaganda campaigns in the Middle East after 9/11, drawing on in-depth interviews with key players and previously classified documents. Dr. Greenberg shows how the United States tried to control perceptions of its response to 9/11 through news and entertainment, and reveals that Arab governments and unofficial actors were involved—knowingly or not—in distributing US propaganda. He explores the institutions, strategy, and rhetoric deployed in the war on terror, placing them in the context of American and Soviet influence campaigns during the Cold War. Greenberg argues that US government-backed broadcasting laid the groundwork for global information warfare, such as the rise of competing Russian and Chinese state media operations. Shedding light on the ideological underpinnings of American propaganda in Arabic after 9/11, The Long War of Ideas offers new insight into soft power in the twenty-first century.

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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Why do adversaries sometimes cooperate to restrain their military competition? Why do they design arms control agreements with intrusive verification in some cases but rely on minimal transparency in others? Amidst ongoing international competition, arms control remains rare despite potential mutual benefits, and agreements vary dramatically in their approaches to monitoring. Enemies in Agreement: Political Volatility and the Design of Arms Control (Cambridge UP, 2026) reveals how uncertainty from domestic political changes, such as leadership transitions or social unrest, can enable arms control.

The book identifies two paths to agreement: during periods of uncertainty, states that previously relied on informal understandings hedge by establishing lightly monitored agreements, while those that anticipated deception take calculated risks through agreements with intensive verification.

Through comprehensive data analysis and rich case studies, Jane Vaynman challenges conventional wisdom about uncertainty in international relations while offering policymakers insights. As states confront challenges from nuclear competition to emerging technologies, understanding when arms control becomes viable is more vital than ever.Our guest is Professor Jane Vaynman, an Assistant Professor of Strategic Studies at the School of Advanced International Studies (SAIS) at Johns Hopkins University.

Our host is Eleonora Mattiacci, an Associate Professor of Political Science at Amherst College. She is the author of "Volatile States in International Politics" (Oxford University Press, 2023).
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