One of the Ten Commandments is ‘Thou shall not kill’. But the Bible doesn’t, of course, forbid all killing. And few of us, whether we have religious commitments or not, are strict absolutists about killing (people, in other words, who believe that taking a life is categorically never morally permissible). Indeed, most of us believe, at the very least, that it is permissible to kill a villainous attacker in self-defence to avoid being killed oneself. Someone might say that, while killing is not always wrong, it is always wrong to kill the innocent. But is even this true? What, for instance, of the woman who wants to end her pregnancy, thereby killing her innocent fetus? Or the doctor tending to a terminally ill patient who desperately wants to die, but cannot self-administer the lethal dose of morphine that would end his suffering? Or the pilot sent on a bombing raid to destroy an enemy military target, who knows that, if he completes his mission, nearby civilians will unavoidably be caught in the blast? This module examines when killing is wrong, why it is wrong when it is wrong, and how far these moral judgments can and ought to be taken into account in law and policy-making. Topics on which we are likely to focus include abortion, euthanasia and assisted suicide, self-defence, terrorism, and war.