01641nas a2200241   4500000000100000000000100001008004100002260000900043653002500052653003600077653003400113653000900147653002300156653002500179653002000204100001500224700001700239700001900256245007300275300001200348490000700360520103200367       2025                            d  c202510aEuro-Atlantic region10ainstitutional capacity building10aintellectual interoperability10aNATO10aregional stability10asecurity cooperation10asecurity sector1 aSae Schatz1 aOlaf Garlich1 aScott Buchanan00aA Theory of Change: 25 Years of the Partnership for Peace Consortium  a149-1680 v243 a<p>This article provides a brief overview of the 25-year history of the Partnership for Peace Consortium of Defense Academies and Security Studies Institutes. It highlights the renewed international commitment to the Consortium and its principles, as observed during its 25th anniversary in 2024. Next, the article examines the Consortium through the Theory of Change concept, a logic modeling method for articulating how immediate actions link to long-term outcomes, particularly within complex systems. This approach analyzes the logical chain of events from the Consortium’s three strategic focus areas--intellectual interoperability, security sector cooperation, and institutional capacity building--to its desired strategic impacts, i.e., increasing regional stability, enhancing global security cooperation in order to address transnational security challenges, and fostering a more peaceful world that shares certain values including a commitment to democratic principles and the rules-based international order.</p>