ABSTRACT I present the case for pacifism by formulating what I take to be the most plausible version of the idea of respect for human life. This generates a very strong, though not necessarily absolute, moral presumption against killing, in war or any other situation. I then show how difficult it is for this presumption to be overridden, either by the considerations invoked in ‘just war’theory, or by consequentialist claims about what can be achieved through war. Despite the strength of (...) the moral case against war, people sometimes say that they have no choice but to fight. In the concluding section of the paper I attempt to identify the relevant sense in which this could be said, and I discuss briefly how this affects the case for pacifism. (shrink)