Prologue

Marking thirty years since the signing of the Dayton Peace Accords is more than an act of remembrance; it is an opportunity to reassess one of the most consequential peace settlements of the late twentieth century through a more integrated lens. The Dayton agreement ended a devastating war, maintained the peace for 30 years, reshaped the political architecture of Bosnia and Herzegovina, and established one of the most complex governance systems in the world, highly resistant to meaningful reform. As such, the anniversary invites a deeper reflection on what this longevity has produced: what Dayton achieved, what it constrained, and what it continues to shape in the country’s political, social, and institutional life. This Knowledge Transfer Module shifts the focus from how Dayton was negotiated to how it has been preserved, implemented, and experienced over three decades, and what this reveals about the nature, durability, and consequences of the peace it created.

This edition also connects back to our earlier work through Mapped & Learned links that remind readers of the two previous Dayton-focused modules. Those earlier editions explored how the agreement was negotiated and what lessons we learned for future mediation, diplomacy, and conflict resolution. They serve as background reference points, allowing this third edition to focus entirely on what followed the peace accords, which were officially initialled on 21 November in Dayton, OH, and signed in Paris on 14 December 1995.

Dayton@30 in Numbers forms the first analytical pillar of this edition. Using thirty long-term indices across governance, democracy, society, economy, migration, demography, environment, and connectivity, it offers a data-driven account of Bosnia and Herzegovina’s post-war trajectory. The indicators reveal a country that secured lasting peace, experienced digital and economic changes, and advanced in several key areas - yet also encountered persistent weaknesses, including democratic backsliding, entrenched corruption, outward migration, uneven public-health resilience, and increasing demographic pressures. This section does not reflect on political narratives; instead, it provides an empirical platform for assessing where the country has progressed, where it has stagnated, and where its structural limits have hardened.

Dayton@30 in Perceptions offers the second interpretive layer, shifting from empirical measurement to the voices of those who have observed the Dayton process most closely. Fourteen international and local experts were invited to reflect on the accords through five lenses: The Good, The Bad, The Missing, The Lesson, and The Result, producing informative yet personal insights. Their reflections reveal how Dayton is remembered, how its effects are understood, and how its legacy may be projected into the future. This section highlights how experts understand Dayton’s evolution: a peace agreement that ended the war and has kept the peace for thirty years, yet one built on a constitutional structure that entrenched fragmentation, constrained reform, and continues to shape the country’s political and social trajectory. Together, these perceptions provide a parallel, human-centred interpretation that complements the analytical story told through the 30 data indicators.

Taken together, the Numbers and Perceptions sections offer a complementary and multidimensional assessment of Dayton@30. Paired with the earlier modules, this edition completes a three-part arc: from how the peace was negotiated, to what lessons were learned for the future, to how its implementation shaped the country that emerged. As Bosnia and Herzegovina and the wider region navigate new uncertainties, this anniversary invites not only a retrospective on Dayton’s achievements and shortcomings, but also a forward-looking understanding of what is required to sustain, build, and implement the peace in the decades ahead.