Former Liberian President Charles Taylor was sentenced to 50 years imprisonment Wednesday for arming and supporting murderous rebels in Sierra Leone in return for “blood diamonds,” a landmark sentence activists hope will send a clear message to despots around the world that they will be held to account for sponsoring atrocities.

Taylor, wearing a blue suit and gold tie, stood grim-faced and silent as Presiding Judge Richard Lussick of Samoa imposed what will likely amount to a life sentence for the 64-year-old.