Attacking another country’s sources of economic power and its political and cultural cohesion is an old practice in warfare. The former was most clearly explored in the theories of strategic bombing that sprung up after the invention of the airplane in the first part of the twentieth century. The latter is considerably older; history is rife with stories of invading armies pulling down temples to local deities. Invariably, both kinds of attacks involved political actors at war. They were already killing one another on a large scale.