The changing conceptual relation between development and security from the1950s to present, and their coming together in a nexus is investigated in the article.The latest interpretation of this nexus is exemplified by Security Sector Reform (SSR) policies.Through an analysis of SSR in Afghanistan, I contend that the implementation of these policies does not reflect their conceptual richness constituted by the concept of human security and human development,but it addresses only state's militarysecurity con-cerns. Despite this partial implementation,SSR policies have become fashionablebe-cause they frame military-security concerns within development polices,and they avoid answering the development question.The consensus among international policymakers is indeed to postpone the tackling of the development question to an unknown future.