Introduction1 Tying the act to the actor: a short history of international proscription2 International proscription regimes: material and symbolic effects3 Proscription and pre-negotiations: the importance of the ‘linguistic ceasefire’4 The ‘linguistic ceasefire’5 Proscription and power6 Revisiting ripeness7 The effect of proscription in ColombiaConclusion: proscribing peace