Thanks for the pointer, Peony. I thought CAJ Coady tackled well some of the ways of thinking about war and how violence is justified (transcript). As you suggest too, I think this robotics led war has the potential for significantly altering the debate: the costs of war are dramatically different to one side (fewer dead soldiers and injured veterans, for instance), which will tend to lower political resistance to war. It can be mobilized stealthily and conducted outside media purview. Also radically different will be the experience of war (fought by remote control from suburban hideouts), redefining things like heroism and courage in combat, loss and suffering. Welcome to a brave new world for war: another case of material progress without moral progress simply raising the stakes for humanity.