Clausewitz in the twenty-first century by Hew Strachan

"......They have argued that Clausewitz was concerned solely with inter-state war and with properly defined armies, and that the sorts of conflicts which he discussed are therefore part of a historical pattern which dominated Europe between 1648, the end of the Thirty Years War, and 1990 itself. Some have gone further, and suggested that Clausewitz's best known aphorism, that war is a continuation of policy by other means, is not only irrelevant today but also inapplicable historically......." - Editorial Reviews