This article contributes to the debate among just war theorists about the ethics of using armed drones in the war on terror. If violence of this kind is to be effectively restrained, it is necessary first to establish an understanding of its nature. Because it is difficult to conceptualize drone-based violence as war, there is concern that such violence is thus not captured by the traditional jus ad bellum framework. Drone strikes probably do not constitute a law enforcement practice, so (...) the peacetime ethics of criminal justice do not apply either. One possible solution is to develop and apply a legitimization framework of jus ad vim in which vim is “force short of war,” although this depends upon a vim–bellum distinction being a sustainable one. Moving beyond discussion of these three alternative concepts of drone-based violence, the article suggests a fourth—vis perpetua —and explores the ethical implications thereof. As a form of violence that presents no physical risk to individual users of force, a program of drone strikes poses a moral problem if it is intended to continue indefinitely, leading to the systematic endangerment of innocents without the eventual promise of peace. (shrink)

The possibility that autonomous weapons will be deployed on the battlefields of the future raises the challenge of determining who can be held responsible for how these weapons act. Robert Sparrow has argued that it would be impossible to attribute responsibility for autonomous robots' actions to their creators, their commanders, or the robots themselves. This essay reaches a much different conclusion. It argues that the problem of determining responsibility for autonomous robots can be solved by addressing it within the context (...) of the military chain of command. The military hierarchy is a system of distributing responsibility between decision makers on different levels and constraining autonomy. If autonomous weapons are employed as agents operating within this system, then responsibility for their actions can be attributed to their creators and their civilian and military superiors. (shrink)

Just wars are supposed to be proportional responses to aggression: the costs of war must not greatly exceed the benefits. This proportionality principle raises a corresponding ‘interpretation problem’: what are the costs and benefits of war, how are they to be determined, and a ‘measurement problem’: how are costs and benefits to be balanced? And it raises a problem about scope: how far into the future do the states of affairs to be measured stretch? It is argued here that weapons (...) innovation always introduces costs, and that these costs cannot be determined in advance of going to war. Three examples, the atomic bomb, the AK-47 and the ancient Greek catapult, are given as examples. It is therefore argued that the proportionality principle is inapplicable prospectively. Some replies to the argument are discussed and rejected. Some more general defences of the proportionality principle are considered and also rejected. Finally, the significance of the argument for Just War Theory as a whole is discussed. (shrink)

The United States Army’s Future Combat Systems Project, which aims to manufacture a “robot army” to be ready for deployment by 2012, is only the latest and most dramatic example of military interest in the use of artificially intelligent systems in modern warfare. This paper considers the ethics of a decision to send artificially intelligent robots into war, by asking who we should hold responsible when an autonomous weapon system is involved in an atrocity of the sort that would normally (...) be described as a war crime. A number of possible loci of responsibility for robot war crimes are canvassed; the persons who designed or programmed the system, the commanding officer who ordered its use, the machine itself. I argue that in fact none of these are ultimately satisfactory. Yet it is a necessary condition for fighting a just war, under the principle of jus in bellum, that someone can be justly held responsible for deaths that occur in the course of the war. As this condition cannot be met in relation to deaths caused by an autonomous weapon system it would therefore be unethical to deploy such systems in warfare. (shrink)

Defence agencies across the globe identify artificial intelligence as a key technology to maintain an edge over adversaries. As a result, efforts to develop or acquire AI capabilities for defence are growing on a global scale. Unfortunately, they remain unmatched by efforts to define ethical frameworks to guide the use of AI in the defence domain. This article provides one such framework. It identifies five principles—justified and overridable uses, just and transparent systems and processes, human moral responsibility, meaningful human control (...) and reliable AI systems—and related recommendations to foster ethically sound uses of AI for national defence purposes. (shrink)

The idea that war is sometimes justified is deeply embedded in public consciousness. But it is only credible so long as we believe that the ethical standards of just war are in fact realizable in practice. In this engaging book, Christopher Finlay elucidates the assumptions underlying just war theory and defends them from a range of objections, arguing that it is a regrettable but necessary reflection of the moral realities of international politics. Using a range of historical and contemporary examples, (...) he demonstrates the necessity of employing the theory on the basis of careful moral appraisal of real-life political landscapes and striking a balance between theoretical ideals and the practical realities of conflict. This book will be a crucial guide to the complexities of just war theory for all students and scholars of the ethics and political theory of war. (shrink)

One of the several reasons given in calls for the prohibition of autonomous weapons systems (AWS) is that they are against human dignity (Asaro, 2012; Docherty, 2014; Heyns, 2017; Ulgen, 2016). However there have been criticisms of the reliance on human dignity in arguments against AWS (Birnbacher, 2016; Pop, 2018; Saxton, 2016). This paper critically examines the relationship between human dignity and autonomous weapons systems. Three main types of objection to AWS are identified; (i) arguments based on technology and the (...) ability of AWS to conform to International Humanitarian Law; (ii) deontological arguments based on the need for human judgement and meaningful human control, including arguments based on human dignity; (iii) consequentialist reasons about their effects on global stability and the likelihood of going to war. An account is provided of the claims made about human dignity and AWS, of the criticisms of these claims, and of the several meanings of ‘dignity’. It is concluded that although there are several ways in which AWS can be said to be against human dignity, they are not unique in this respect. There are other weapons, and other technologies, that also compromise human dignity. Given this, and the ambiguities inherent in the concept, it is wiser to draw on several types of objections in arguments against AWS, and not to rely exclusively on human dignity. (shrink)

A new powerful military weapon has appeared in the skies of world and with it a new form of warfare has quickly emerged bringing with it a host of pressing ethical questions and issues. Killing By Remote Control: The Ethics of an Unmanned Military brings together some of the best scholars currently working on these questions.

Plans to automate killing by using robots armed with lethal weapons have been a prominent feature of most US military forces? roadmaps since 2004. The idea is to have a staged move from ?man-in-the-loop? to ?man-on-the-loop? to full autonomy. While this may result in considerable military advantages, the policy raises ethical concerns with regard to potential breaches of International Humanitarian Law, including the Principle of Distinction and the Principle of Proportionality. Current applications of remote piloted robot planes or drones offer (...) lessons about how automated weapons platforms could be misused by extending the range of legally questionable, targeted killings by security and intelligence forces. Moreover, the alleged moral disengagement by remote pilots will only be exacerbated by the use of autonomous robots. Leaders in the international community need to address the difficult legal and moral issues now, before the current mass proliferation of development reaches fruition. (shrink)

Jeff McMahan urges us to reject the view, dominant throughout history, that mere participation in an unjust war is not wrong.

In this re-written classic text, the author provides a critical review of the various different ways in which ethical debates about warfare are already framed, and asks probing questions about how we think about war, and the changes it is undergoing.