Based on unprecedented empirical research conducted with lower levels of the Afghan police, this unique study assesses how institutional legacy and external intervention, from countries including the UK and the US, have shaped the structural conditions of corruption in the police force and the state. Taking a social constructivist approach, the book combines an in-depth analysis of internal political, cultural and economic drivers with references to several regime changes affecting policing and security, from the Soviet occupation and Mujahidin militias to Taliban religious police. Crossing disciplinary boundaries, Singh offers an invaluable contribution to the literature and to anti-corruption policy in developing and conflict-affected societies.