New definition of warfare after clausewitz

Michael Gleven has given a new definition of war. He says that war is an actual, widespread and delibrate armed conflict between political communities motivated by a sharp disagreement over governance.

Where as the traditional definition of clausewitz was that war is a continuation of policy be other means.

Which definition is superior over other? Do they reflect same understanding in different words? Which definition fits over the insurgency in tribal areas better?