'Never again' has been an oft-repeated refrain ever since the Holocaust by world leaders faced with responding to state sponsored mass atrocity crimes. Unfortunately, 'Never again' has been necessarily transformed to 'alas, once again' too many times since 1945. The failure of the international community to halt the horrors it knew were being perpetrated in Rwanda and Srebrenica in 1994 and 1995 respectively testify that today, as in the time of Thucydides, the 'The strong do as they can, while the weak suffer what they must.' How can the international community in the 21st century square the...