Abstract

In this chapter, I take up the question of whether one of the central principles of jus ad bellum – just cause – is relevant in a world in which cyberattacks occur. I argue that this principle is just as relevant as ever, though it needs modification in light of recent developments. In particular, I argue, contrary to many traditional just war theorists, that just cause should not be limited to physical attacks. In the process, I offer an improved definition of cyberattack and show how some other principles of jus ad bellum constrain this widened notion of just cause.