Simon Norfolk has photographed sites of genocide. The names ring like a death toll for the twentieth century – Rwanda, Cambodia, Vietnam, Auschwitz, Dresden, Ukraine, Armenia, Namibia ... Charged with emotional intensity Norfolk's photographs document the human traces left behind: a tooth Iying in a field, or the worn steps of a death camp. Published in 1998, it marked the fiftieth anniversary of the United Nations convention on genocide. With the twentieth century now at a close this book is a profound comment on its worst atrocities.