This document reviews the growing academic interest in complexity theory within public management since the 2008 special edition of the Public Management Review, highlighting its potential to provide insights into non-linear interactions and emergent behaviors in policy processes. Scholars have increasingly applied complexity concepts to better understand dynamic change in public administration, leading to the establishment of new journals and frameworks that integrate complexity and network theories. The papers in this special edition present various perspectives on how complexity can inform problem framing, institutional design, and adaptive practices in public management contexts.