Despite the disasters of Iraq, Afghanistan, Syria and ever more visible evidence of the horrors of war, the concepts of Humanitarian Intervention and Just War enjoy widespread legitimacy and continue to exercise an unshakeable grip on our imaginations. Robin Dunford and Michael Neu provide a clear and comprehensive critique of both Just War Theory and the Responsibility to Protect (R2P) doctrine, deconstructing the philosophical, moral and political arguments that underpin them. In doing so, they show how proponents of Just War and R2P have tended to treat killing in a way which obscures the complex and often messy reality of war, and pays little heed to the human impact of such conflicts. Going further, they provide answers to such difficult questions as Surely it would have been just for us to intervene in the Rwandan genocide? An essential guide to one of the most difficult moral and political issues of our age.