This NAI Discussion Paper critically explores the concepts, norms and practices of reconstruction and peace building in post-conflict West Africa, drawing largely on the case of Liberia and Sierra Leone. It provides an up-to-date analysis and critique of the impact of the UN-led praxis and practice of peace building in the post-conflict states in the region. The material in this study covers the context of post-conflict reconstruction and peace building in West Africa; the evolution and analysis of the global peace building regime; the architecture of peace building in West Africa; the 'un-making' of peace building in Sierra Leone. It also interrogates the basic assumtions that underpin international peace building in Africa, noting that at best, it is designed to promote stability and security rather than a deeper and more sustainable popular and socially rooted peace. Olawale Ismail is a Research Fellow with the Conflict, Security and Development Group (CSDG), King's College, London.