The “democratic peace” as a justification narrative

Project leader: Prof. Dr. Christopher Daase

With reference to Immanuel Kant’s essay “On Perpetual Peace” (1795), the contemporary theory of democratic peace (DF) claims that consolidated democracies do not wage wars against each other or are even inherently more peaceful than other types of rule. This theory draws on numerous idealizing rationality assumptions about the institutions, political culture and action orientations of citizens and elites of liberal-democratic democracies. The roots of this branch of research in the civilization-optimistic legacy of the Enlightenment are unmistakable, but have problematic scientific and political consequences: Scientifically, it leads to questionable explanatory approaches and prognoses and politically to the consolidation of an overly positive self-image of Western states. In extreme cases, DF research is used to justify violent democratization or to justify demands for a “club of democracies”. In this respect, the DF theory serves to underpin a conflict-aggravating identity politics of democratic actors. Overall, since the end of the Cold War, research on democratic peace, which has become almost unmanageable, has become an influential justification narrative for Western foreign policy strategies and world order concepts: Global democracy promotion is seen as the long-term key to achieving greater stability and peace within the framework of a liberal world order.

This project took a critical look at the (meta-)theoretical foundations of DF theory and deconstructed its assumptions of rationality with the help of arguments and insights from state theory, democratic theory and the sociology of modernity. The aim was to show that the micro-theoretical foundations of DF rest on more than fragile ground. It was shown that potentially violence-promoting exclusion processes and threat constructions mean that peace within and between democracies will always be precarious. As a result, the project showed that political claims about the peace achievements of democracies are therefore idealized.

Dr. Geis wrote her habilitation thesis as part of the project and was habilitated in 2012. She has been a professor of political science at Helmut Schmidt University Hamburg since 2016.

The project’s most important publications include:
*Geis, Anna (2011): “Of Bright Sides and Dark Sides: Democratic Peace beyond Triumphalism”, in: International Relations, 25(2), 18-25.
*Geis, Anna /Wagner, Wolfgang (2011): “How far is it from Königsberg to Kandahar? Democratic Peace and Democratic Violence in International Relations”, in: Review of International Studies, 37(4), 1555-1577.
*Geis, Anna/Wolff, Jonas (2011): “Demokratie, Frieden und Krieg. Der “Demokratische Frieden” in der deutschsprachigen Friedens- und Konfliktforschung”, in: Peter Imbusch/ Peter Schlotter/ Simone Wisotzki (eds.): Friedens- und Konfliktforschung – ein Studienbuch, Baden-Baden: Nomos (Series Forschungsstand Politikwissenschaft), 112-138.
Daase, Christopher (2011): ‘Neue Kriege und neue Kriegführung als Herausfoderungen für die Friedenspolitik’, in: Werkner, Ines-Jacqueline/ Kronfeld-Goharani, Ulrike (eds.), The ambivalent peace. Peace research faces new challenges Wiesbaden: VS-Verlag, 21- 35.

News from the research center

Event
20.04.2026 | Brussels

Militärische KI verantwortungsvoll nutzen und Regulierung neu denken

Panel Discussion, Lecture

Künstliche Intelligenz findet im Militär immer breiteren Einsatz, von Logistik und Training über Missionsplanung und Zielidentifikation bis hin zu autonomen Waffensystemen. Gleichzeitig wächst die Bedeutung von Mikroprozessoren immer stärker, der Zugang zu seltenen Erden und Chips wird zur zentralen Ressource. KI kann das Kampfgeschehen beschleunigen und damit destabilisierend wirken. Der Wettlauf um neue Fähigkeiten birgt jedoch auch Eskalationsrisiken. Wir laden Sie ein, diese Themen im nächsten Crisis Talk gemeinsam mit unseren hochkarätigen Podiumsgästen zu diskutieren.

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Event
28./29.05.2026 | Frankfurt am Main

Global Health Justice: Principles and Practice

Conference

Following the research focus of the Global Health Justice Postdoctoral Programme, the "Global Health Justice: Principles and Practice" conference places a particular emphasis on themes such as the human right to health, political activism and health justice issues, and problems of structural injustice and vulnerable populations in health care. Keynote lectures by Jonathan Wolff and Kanchana Mahadevan.

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Publication
26.03.2026 | Monograph

The Cambridge History of Latin American Law in Global Perspective

Duve, Thomas; Herzog, Tamar (eds.): The Cambridge History of Latin American Law in Global Perspective, Cambridge: Cambridge University Press, 2024 (portugiesisch 2025; spanisch 2026).

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Publication
26.03.2026 | Monograph

Rechtsgeschichte des frühneuzeitlichen Hispanoamerika

Duve, Thomas; Egío, José Luis  (2023): Rechtsgeschichte des frühneuzeitlichen Hispanoamerika, Berlin: De Gruyter, 2023.

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Event
18.04.2026 | Frankfurt am Main

Das Prinzip Donald Trump und die Verrohung der Welt

Panel Discussion, Lecture

Ein neuer Politikstil macht international Karriere. Er ist gekennzeichnet von Vulgarität, Verrohung und erklärter Rechtsfeindschaft. Machtinteressen werden nicht mehr juristisch bemäntelt. Stattdessen wird das angebliche Recht des Stärkeren zur Staatsdoktrin gemacht – innenpolitisch wie außenpolitisch. Treibende Kraft hinter dieser Verrohung der politischen Sitten ist ein US-Präsident, der nicht nur die amerikanische Gesellschaft und Kultur, sondern auch die globale Ordnung nach seinen Vorstellungen und Interessen umgestaltet. Die Römerberggespräche wollen diesen Politikstil verstehen.

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Event
14.07.2026 | Frankfurt am Main

Democracy Over Time and the Climate Crisis

Lecture Series

Vortrag von Anja Karnein (Binghamton). Die Vortragsreihe untersucht Fragen der Klimakrise als Herausforderungen für demokratische Gesellschaften und konzentriert sich auf Themen wie politische Legitimität, Widerstand gegen fossile Brennstoffe und die Interessen künftiger Generationen. Sie wird organisiert von Prof. Dr. Darrel Moellendorf und Dr. Lukas Sparenborg.

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Event
10.06.2026 | Frankfurt am Main

Capital Investment, Inequality, and State Power in a Time of Climate Emergency

Lecture, Lecture Series

The lecture series examines questions of the climate crisis as challenges for democratic
societies and focuses on issues of political legitimacy, fossil fuel resistance, and the interests
of future generations.

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Event
13.05.2026 | Frankfurt am Main

Failed States and Cloudy skies: Tipping Points, Overshoot and Permanent Emergency, after America

Lecture Series

The lecture series examines questions of the climate crisis as challenges for democratic
societies and focuses on issues of political legitimacy, fossil fuel resistance, and the interests
of future generations.

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Event
22.04.2026

Political Legitimacy, Authoritarianism, and Climate Change

Lecture, Lecture Series

Lecture by Ross Mittiga (SOAS London). The lecture series examines questions of the climate crisis as challenges for democratic societies and focuses on issues of political legitimacy, fossil fuel resistance, and the interests of future generations. It is organized by Prof. Dr. Darrel Moellendorf and Dr. Lukas Sparenborg.

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