Milan Lukic made his name in the sadistic world of Serbian paramilitary warlordism by burning alive Bosnian Muslim women and children in the ancient hill town of Visegrad on the Bosnian border with Serbia. He was also partial to a spot of recreational murder by shooting. That was in 1992. Yesterday Mr Lukic was jailed for life at the international war crimes tribunal in the Hague. We owe it to the victims never to forget such crimes. This fine piece by the Guardian's Europe Editor, Ian Traynor, helps us to remember and to understand the context in which Lukic committed his atrocities.