Argument: ICC and rule of law help deter war crimes and genocide
Gary T. Dempsey. "Reasonable Doubt: The Case Against the Proposed International Criminal Court". CATO Institute. 16 July 1998 - the "peace versus justice" trope often invoked by Westerners is the wrong way to think about Darfur. It's not a choice between peace and justice, not if we are serious about meaningful peace: for it is precisely the relentless absence of justice and accountability (impunity) that has sustained violence in Darfur and will continue to do so if unaddressed.
Former president Jimmy Carter - "the most important thing in knowing that the international criminal court is there, I think would be a great deterrent among those who might be inclined to perpetuate these kinds of crimes."
Norman Dorsen of the Lawyers Committee for Human Rights and Morton Halperin of the Twentieth Century Fund - "to deter those who would contemplate such horrendous crimes."