The essay examines the lessons from the international intervention in Afghanistan, highlighting the failures of externally imposed state building, including neglect of local governance structures and prioritizing donor interests over Afghan ownership. The international peace- and state-building intervention in Afghanistan, which spanned two decades, culminated in the abrupt withdrawal of U.S. troops in 2021, leading to the Taliban’s swift resurgence. This event has sparked a critical examination of the strategies employed by NATO and allied nations during their engagement in Afghanistan. This essay aims to distill seven key lessons from this intervention, emphasizing the need for future peacebuilders to adapt their approaches to better align with local contexts and realities. The analysis highlights the failures of liberal peacebuilding, the importance of local ownership, the necessity of effective and legitimate institutions, and the detrimental impact of corruption. Furthermore, it underscores the significance of coherence among international actors and the need for a nuanced understanding of regional dynamics. By reflecting on these lessons, the essay seeks to provide actionable insights for future international interventions in fragile and conflict-affected states.