The era of the West’s enthusiasm for military intervention is over. Two reports on Iraq and Libya—written from the heart of the British establishment and published recently—have delivered its obituary. Each is damning; together, they dismember the case for intervention in both its neocon and liberal-hawk variants. Although their focus is almost exclusively on decision-making within Whitehall—the Foreign and Commonwealth Office (FCO), the Ministry of Defence, and, above all, No. 10 Downing Street—Americans will recognize many of the same ills afflicting their own government.