Since independence and for fourteen years of war, Liberia’s army, police and other security agencies have mostly been sources of insecurity and misery for a destitute people. The internationally driven attempt to radically reform the security sector since the war’s end in 2003 is a major chance to put this right and prevent new destabilisation. Security sector reform (SSR) programs have been unprecedented in ambition but with mixed results. Army reform, entailing complete disbanding of existing forces, has made significant progress despite lack of proper oversight of private military companies (PMCs) and of consensus on strategic objectives. But police and other security reforms are much less satisfactory. The bold approach to army reform was possible due to strong national consensus and the presence of a large, liberally mandated UN presence. Government and donors must sustain their support to maintain hard-won momentum in army reform and, once clear benchmarks are set, give a floundering police force more resources. The drawdown of the UN force, begun in the second half of 2008, underlines the urgency.