In this post, Carolina Sartorio discusses her recent article in the Causation in War Symposium in Journal of Applied Philosophy on how degrees of causation can (and cannot) bear on liability to harm.

The recent literature on the ethics of war draws heavily on the concept of causation. Your liability to be attacked during a war, some suggest, depends on the extent of your causal contribution to an unjust threat. Prominent theorists like Jeff McMahan and Cecile Fabre embrace a principle of civilian immunity on this basis: they claim that civilians (unlike soldiers) aren’t liable to attack because their causal contributions to an unjust war are typically very minimal. These ideas rest on an important assumption: that causation comes in degrees. But, is this assumption true? In my article, I argue against it. I claim that the appearance that causation comes in degrees is an illusion that can be explained away.

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In this post, Helen Frowe and Massimo Renzo introduce a recent symposium they edited in Journal of Applied Philosophy on how accounts of causation bear on ethics in war.

Causation, and differences in types of causal contribution, underpin various issues in the ethics of war and defensive harming. For example, one of the key ideas about defensive harming is that of moral liability to defensive harm. A standard view of liability is that a person forfeits her right not to suffer harm if she is morally responsible for a threat of unjust harm to others. Her specific connection to the threat might matter in several ways – the degree, type, and proximity to causation might all make a difference to her liability. Some writers argue that although civilians causally contribute to threats of unjust harm in war, they do not contribute enough to render themselves liable to (lethal) attack. Others argue that making distinctively military causal contributions, such as providing weapons, makes one a candidate for liability, but contributing food or medical supplies does not. Still others argue that one’s position in the causal chain bears on one’s liability: only those who directly pose threats of unjust harm, or who are sufficiently causally proximate to them, are liable to defensive harm.

However, despite their centrality to some of the most important issues in the ethics of war and self-defence, there has been very little exploration of whether these claims withstand scrutiny from the perspective of our best accounts of causation. To cast some light on this, the Conversations on War project, which is run by the Stockholm Centre for the Ethics of War and Peace and the YTL Centre at King’s College, London, set out to explore how philosophers working on the ethics of war can draw on research in other areas of philosophy to improve our accounts of harming in war, and how research on the ethics of war might challenge or illuminate work in those other areas. In this post, we summarise our introduction to a symposium that arose from these conversations that offers a substantial critical analysis of the role of causation in contemporary work on the ethics of war and self-defence, and is an important move towards making work on just war theory and defensive harm less insular.

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