Right to Self-Defense

International regulation of autonomous weapon systems (AWS) is increasingly conceived as an exercise in risk management. This requires a shared approach for assessing the risks of AWS. This paper presents a structured approach to risk assessment and regulation for AWS, adapting a qualitative framework inspired by the Intergovernmental Panel on Climate Change (IPCC). It examines the interactions among key risk factors—determinants, drivers, and types—to evaluate the risk magnitude of AWS and establish risk tolerance thresholds through a risk matrix informed by (...) background knowledge of event likelihood and severity. Further, it proposes a methodology to assess community risk appetite, emphasizing that such assessments and resulting tolerance levels should be determined through deliberation in a multistakeholder forum. The paper highlights the complexities of applying risk-based regulations to AWS internationally, particularly the challenge of defining a global community for risk assessment and regulatory legitimization. (shrink)

This paper argues that there is a significant moral difference between force applied against (imminent) attackers on the one hand and force applied against “threatening” people who are not (imminent) attackers on the other. Given that there is such a difference, one should not blur the lines by using the term “self-defense” (understood as including other-defense) for both uses of force. Rather, only the former is appropriately called self-defense, while for the latter, following German legal terminology, the term “justifying defensive (...) emergency” will be used here. The two justifications are not governed by the same criteria and thus lead to different results. The paper will proceed by providing first, in section (1), a brief sketch of the contours of the self-defense justification, putting particular emphasis on the necessity criterion. On the account presented here, the necessity criterion of the self-defense justification is particularly harsh on the aggressor (and thus not to be interpreted as literally requiring the employment of “the mildest means”) and its applicability is only triggered by an (imminent) attack, not by other kinds of threats. Section (2) will then further explain the differences between self-defense and justifying defensive emergency. A particularly important difference is that people who are subjected to justified self-defense cannot permissibly defend themselves, while people who are subjected to (extremely harmful or even lethal) justified defensive emergency measures can. Thus, in this latter case we have a “moral equality” (of sorts) of the involved parties: they can permissibly use force against each other. Section (3) will list and defend some conditions that a successful argument against the imminence requirement of the self-defense justification has to satisfy. In the light of these conditions, sections (4) to (7) will discuss a number of objections that have been adduced against the imminence requirement as well as proposals that have been made in support of alternative accounts. It will be argued that all these objections and proposals fail. Section (8) will provide a number of thought experiments in support of the claim that the harsh necessity criterion of the self-defense justification is only triggered by imminence while force against non-imminent threats can be justified with the help of the justifying emergency exemption, as well as for the claim that the justifying emergency exemption puts the person using preventive force against non-imminent threats on a shorter leash and makes him liable to counter-measures. Section (9) will explain the rationale for tying the applicability of the harsh necessity criterion of the self-defense justification to imminent attacks. Section (10) will discuss some special cases and show why they do not undermine the normative validity of this tie. (shrink)

Rights forfeiture or liability are not a path to the permissibility of self-defense (not even barring extraordinary circumstances), and the necessity condition is not intrinsic to justified self-defense. Rather, necessity in the context of justification must be distinguished from necessity in the context of rights forfeiture. While innocent aggressors only forfeit their right against necessary self-defense, culpable aggressors also forfeit, on grounds of a principle of reciprocity, certain rights against unnecessary self-defense. Yet, while culpable aggressors would therefore not be wronged (...) by certain unnecessary defensive means, the use of such means against them would still not be justified. The underlying rationale of this necessity requirement lies not in the rights of the aggressor, but in an agent-relative requirement to take fair precautions against violating the rights of the innocent. This concern is also expressed in the necessity criterion defended and formulated in this paper, which is very harsh on aggressors. To wit, the necessity condition for justified self-defense must not be interpreted as requiring the employment of literally the least harmful means or of means that the defender reasonably believes to be, literally, the least harmful ones. What he must believe about the properties and possible effects of the means he employs is something that is much less demanding. Finally, the necessity condition of justified self-defense is also harsh (on the aggressor) in not implying a “success condition” worth its name. (shrink)

Christopher J. Finlay claims “that a principle of moral or legitimate authority is necessary in just war theory for evaluating properly the justifiability of violence by non-state entities when they claim to act on behalf of the victims of rights violations and political injustice.” In particular, he argues that states, unlike non-state actors, possess what he calls “Lesser Moral Authority.” This authority allegedly enables states to invoke “the War Convention,” which in turn entitles even individual soldiers on the aggressive side (...) to use military violence against soldiers defending the victim state. Non-state actors, in contrast, have to fulfill more stringent requirements. If they do not, then even their attacks on military personnel can properly be called "terrorist." In the following I will argue that Finlay’s attempt to show the importance of the legitimate authority criterion of just war theory and to demonstrate that non-state violence has to satisfy heavier burdens of justification than state violence fails for a number of reasons: his claim that defenders would wrong victims if they defended them against their will is mistaken, he overlooks the fact that non-state agents need not claim to fight on someone’s behalf, the full moral authority he mentions is redundant, the powers he ascribes to “Lesser Moral Authority” are, depending on interpretation, either morally irrelevant or nonexistent, and his claim that granting states “Lesser Moral Authority” is beneficial from a “moral pragmatic” point of view while granting the same authority to non-state actors is not, is unwarranted. (shrink)

I argue that rights-forfeiture by itself is no path to permissibility at all (even barring special circumstances), neither in the case of self-defense nor in the case of punishment. The limiting conditions of self-defense, for instance – necessity, proportionality (or no gross disproportionality), and the subjective element – are different in the context of forfeiture than in the context of justification (and might even be absent in the former context). In particular, I argue that a culpable aggressor, unlike an innocent (...) aggressor, forfeits rights against proportionate defense, including unnecessary defense (as well as rights against the infliction of proportionate non-defensive harm). Yet, I demonstrate that this stance need not lead to the abandonment of the necessity condition of justified self-defense in the case of a culpable aggressor. Since justification and liability are not the same, there is no reason to assume that the necessity condition of justified self-defense must be explained under an appeal to the aggressor’s rights. Parallel arguments apply to the other limiting conditions of permissible self-defense as well as to the limiting conditions of permissible punishment. Accordingly, I also sketch alternative explanations of the proportionality requirement and the subjective element. All these alternative explanations appeal to a principle of precaution: instead of explaining the unjustifiability of unnecessarily harming a culpable attacker or wrongdoer by an appeal to the rights of the attacker or wrongdoer himself, one can also, and better, explain it by a requirement to take reasonable precautions against violating the rights of innocent people. (shrink)

Jonathan Quong proposes the following “Stringency Principle” for proportionality in self-defense: “If a wrongful attacker threatens to violate a right with stringency level X, then the level of defensive force it is proportionate to impose on the attacker is equivalent to X.” I adduce a counter-example that shows that this principle is wrong. Furthermore, Quong assumes that what determines the stringency of a person’s right is exclusively the amount of force that one would have to avert from someone else in (...) order to have a necessity justification for one’s transgressing the right in order to avert said force. Yet, Quong provides no argument as to why, first, the stringency of a right should be measured exclusively with reference to permissible rights-infringement; and second, he provides no explanation as to why the permissibility of the rights-infringement should be established with reference to “someone else,” namely with reference to an “innocent person,” instead of with reference to the person against whom the right in question is actually being held: the aggressor. I argue that the latter option is certainly the more plausible one, but so amended the stringency principle will be unable to adjudicate any substantive questions about proportionality in self-defense. In particular, Quong’s account cannot “explain” – contrary to what Quong claims – the allegedly intuitive judgment that one must not kill in defense of property or in order to avoid minor injuries. (shrink)

This paper explores why victims who provoke their aggressors seem to compromise their right to self-defence. First, it argues that one proposed answer – the victims are partially responsible for the threats they face – fails. It faces counterexamples that it cannot adequately address. Second, the paper develops the Protective Duty View according to which we incur protective duties towards others when we interfere with their reasonable opportunities to avoid suffering harm. Since provokers wrongfully interfere with prospective aggressors’ opportunities to (...) avoid posing a threat and thus to be defensively harmed, they incur protective duties towards the aggressors. This can require that they significantly limit or even refrain from using defensive force. The paper ends by drawing out some of the implications of the Protective Duty View for issues related to war and punishment. (shrink)

Suppose A is wrongfully attempting to kill you, thereby forfeiting his right not to be harmed proportionately in self-defense. Even if it were proportionate to blow off A's arms and legs to stop his attack, this would be impermissible if you could stop his attack by blowing off just one of his arms. Blowing off his arms and legs violates the necessity condition on imposing harm. Jonathan Quong argues that violating the necessity condition consists in violating a right to be (...) rescued: blowing off four of A’s limbs in proportionate self-defense rather than blowing off one of A’s limbs in proportionate self-defense fails to costlessly rescue three of A's limbs. In response, we present cases which intuitively show that violating the necessity constraint involves the violation of a right that is more stringent than a right to be rescued. (shrink)

In the United States, police use of force experts often maintain that controversial police shootings where an unarmed person’s hand gesture was interpreted as their “going for a gun” are justifiable. If an officer waits to confirm that a weapon is indeed being pulled from a jacket pocket or waistband, it may be too late to defend against a lethal attack. This article examines police policy norms for self-defense against “uncertain threats” in three contexts: (1) known in-progress violent crimes, (2) (...) interactions with civilians behaving non-aggressively, and (3) interactions with civilians behaving aggressively. It is argued that the context of a known in-progress violent crime gives rise to threat probability-, fairness-, and lesser evil-based reasons for a norm permitting police officers to use lethal force. However, in the contexts of civilians behaving non-aggressively and civilians behaving aggressively, such a norm is not justifiable. In the former case, I introduce two conditions, the Justification condition and the Valuing Civilian Lives condition, which I argue are not presently met. In the latter case, these two conditions again are not met; aggression may moreover be excused or justified due to background injustices around race and the criminal justice system. (shrink)

Perhaps the biggest disconnect between philosophers and non-philosophers on the question of gun rights is over the relevance of arms to our dignitary interests. This essay attempts to address this gap by arguing that we have a strong prima facie moral right to resist with dignity and that violence is sometimes our most or only dignified method of resistance. Thus, we have a strong prima facie right to guns when they are necessary often enough for effective dignified resistance. This approach (...) is distinctively non-libertarian: it doesn’t justify gun rights on the basis of (mere) liberty or security. Nonetheless it is compatible with libertarian defenses of gun rights based on a liberty right to guns, and, if sound, in fact lowers the bar for gun rights in some ways, as it justifies access to guns even when nonviolent means would better achieve the liberty or security aims of potential victims. And although this defense of gun rights is most readily categorized as “conservative” or rightist, it relies upon principles and intuitions about dignity popular among progressives in other domains, such as in disability, women’s, or LGBT rights debates. (shrink)

The Philosophical Forum, Volume 52, Issue 3, Page 211-220, Fall 2021.

In this chapter, I add to the new body of philosophical literature that addresses African approaches to just war by reflecting on some topics that have yet to be considered and by advancing different perspectives. My approach is two-fold. First, I spell out a foundational African ethic, according to which one must treat people’s capacity to relate communally with respect. Second, I derive principles from it to govern the use of force and violence, and compare and contrast their implications for (...) war with other recent African views and especially with some prominent accounts in contemporary Anglo-American philosophy. I argue that the approaches to military conflict prescribed by the Afro-communal ethic and its derivative principles differ, and in some prima facie plausible ways, from the views of thinkers that include Thomas Hurka, David Luban, Larry May, Jeff McMahan, and Michael Walzer. In particular, I conclude that the African perspectives ground some interesting and under-explored approaches to just causes for war that merit consideration, including the ideas that military conflict could in principle be justified in order to protect a people’s culture or to correct an aggressor’s vice. (shrink)

The “right intention” requirement, in the form of a requirement that the agent must have a justified true belief that the mind-independent conditions of the justification to use force are fulfilled, is not an additional criterion, but one that constrains the interpretation of the other criteria. Without it, the only possible interpretation of the mind-independent criteria is purely objectivist, that is, purely fact-relative. Pure objectivism condemns self-defense and just war theory to irrelevance since it cannot provide proper action guidance: it (...) is impractically demanding. This means that “revisionist” just war theories which base their doctrine of the moral inequality of combatants on the idea that objective justification defeats liability are irrelevant for the real world, where objective justification is virtually inaccessible. Moreover, only the right intention requirement in the form of a knowledge requirement, as opposed to requiring “good intentions” or “acceptable motivations,” can solve this problem. (shrink)

After a fatal police shooting in the United States, it is typical for city and police officials to view the family of the deceased through the lens of the law. If the family files a lawsuit, the city and police department consider it their legal right to defend themselves and to treat the plaintiffs as adversaries. However, reparations and the concept of “reparative justice” allow authorities to frame police killings in moral rather than legal terms. When a police officer kills (...) a person who was not liable to this outcome, officials should offer monetary reparations, an apology, and other redress measures to the victim’s family. To make this argument, the article presents a philosophical account of non-liability hailing from self-defense theory, centering the distinction between reasonableness and liability. Reparations provide a non-adversarial alternative to civil litigation after a non-liable person has been killed by a police officer. In cases where the officer nevertheless acted reasonably, “institutional agent-regret” rather than moral responsibility grounds the argument for reparations. Throughout the article, it is argued that there are distinct racial wrongs both when police kill a non-liable black person and when family members of a black victim are treated poorly by officials in the civil litigation process. (shrink)

In her inventive and tightly argued book Defensive Killing, Helen Frowe defends the view that bystanders—those who do not pose threats to others—cannot be liable to being harmed in self-defence or in defence of others. On her account, harming bystanders always infringes their rights against being harmed, since they have not acted in any way to forfeit them. According to Frowe, harming bystanders can be justified only when it constitutes a lesser evil. In this brief essay, I make the case (...) that some bystanders can indeed be liable to harm. They can be liable, I will argue, because they can be morally responsible for threats of harm, and in becoming responsible they can forfeit their rights. While bystanders cannot be responsible for initiating threats, they can become responsible for the persistence of threats, and for culpably failing to prevent them from being initiated in the first place. (shrink)

In Chapter 7, “Dignity, Self-Respect, and Bloodless Invasions”, Saba Bazargan-Forward asks How much violence can we impose on those attempting to politically subjugate us? According to Bazargan-Forward, “reductive individualism” answers this question by determining how much violence one can impose on an individual wrongly attempting to prevent one from political participation. Some have argued that the amount of violence one can permissibly impose in such situations is decidedly sub-lethal. Accordingly, this counterintuitive response has cast doubt on the reductive individualist project. (...) Bazargan-Forward argues, however, that political subjugation involves an institutionally embodied form of disrespect that has been altogether missed. A proper appreciation of this sort of disrespect, he contends, morally permits much greater defensive violence against those attempting to politically subjugate us or others. (shrink)

I argue that the lives of domestic and enemy civilians should not receive equal weight in our proportionality calculations. Rather, the lives of enemy civilians ought to be “partially discounted” relative to the lives of domestic civilians. We ought to partially discount the lives of enemy civilians for the following reason (or so I argue). When our military wages a just war, we as civilians vest our right to self-defense in our military. This permits our military to weigh our lives (...) more heavily. Before arguing for this view I first explain why recent accounts attempting to show the opposite – that enemy civilians ought to be weighed more heavily – are mistaken. (shrink)

This article considers the proportionality requirement of the self-defense justification. It first lays bare the assumptions and the logic—and often illogic—underlying very strict accounts of the proportionality requirement. It argues that accounts that try to rule out lethal self-defense against threats to property or against threats of minor assault by an appeal to the supreme value of life have counter-intuitive implications and are untenable. Furthermore, it provides arguments demonstrating that there is not necessarily a right not to be killed in (...) defense against theft or minor assaults. While there is a general moral right of self-defense and a general right to life, the scope of these rights depends on certain social facts that—even within a liberal framework—can differ from one society to another. Moreover, the proportionality of self-defense does not depend on the rights of the aggressor alone, but also on a precautionary rule, shaped by the balance of interests of the society in question and aimed at protecting innocent people and other social interests. This rule can protect an aggressor even in cases where he does not have the right to such protection. (shrink)

A minimally responsible threatener is someone who bears some responsibility for imposing an objectively wrongful threat, but whose responsibility does not rise to the level of culpability. Minimally responsible threateners include those who knowingly commit a wrongful harm under duress, those who are epistemically justified but mistaken in their belief that a morally risky activity will not cause a wrongful harm, and those who commit a harm while suffering from a cognitive impairment which makes it prohibitively difficult to recognize and (...) act on what is morally required of them. The chapter argues that minimally responsible threateners can indeed be morally liable for the harms they impose. Put differently, culpability is not a necessary basis for liability. (shrink)

McMahan argues that justification defeats liability to defensive attack (which would undermine the thesis of the "moral equality of combatants"). In response, I argue, first, that McMahan’s attempt to burden the contrary claim with counter-intuitive implications fails; second, that McMahan’s own position implies that the innocent civilians do not have a right of self-defense against justified attackers, which neither coheres with his description of the case (the justified bombers infringe the rights of the civilians) nor with his views about rights (...) forfeiture, is unsupported by independent argument, and, in any case, extremely implausible and counter-intuitive; and third, that his interpretation of the insulin case confuses the normative relations between an agent’s justification and non-liability on the one hand and permissible or impermissible interference with the agent’s act on the other. Similar confusions, fourth, affect his discussion of liability to compensation. (shrink)

I shall argue that in some wars both sides are (as a collective) justified, that is, they can both satisfy valid jus ad bellum requirements. Moreover, in some wars – but not in all – the individual soldiers on the unjustified side (that is, on the side without jus ad bellum) may nevertheless kill soldiers (and also civilians as a side-effect) on the justified side, even if the enemy soldiers always abide by jus in bello constraints. Traditional just war theory (...) and self-proclaimed “revisionist” just war theory think otherwise since the former focuses on the law enforcement or public authority justification for inflicting harm and the latter on the self-defense justification. These are both intrinsically asymmetrical justifications: there is no justified self-defense (properly understood) against justified self-defense, nor is there justified law-enforcement against justified law-enforcement. However, there can, as I will show, be justified self-defense against force that is justified by a necessity justification, and there can be force justified by a necessity justification being used against force that is also justified by a necessity justification. The necessity justification is not intrinsically asymmetrical, and it is an indispensable justification in the context of war. Moreover, with regard to some forms of inflicting harm on others one may give special weight to one’s own interests and the interests of those to whom one has special responsibilities when assessing the proportionality of those acts. That is, the proportionality calculation may be agent-relative. This is in particular so in the case of foreseeably preventing innocent and non-threatening people from being saved (for instance, by shooting down a tactical bomber who would have saved them by destroying an ammunitions factory) but less so in the case of the intentional or foreseeable direct harming of innocent and non-threatening people (dropping bombs on people standing near an ammunitions factory). In the light of these considerations, I will then answer the question as to when soldiers may justifiably participate in war (and when not). (shrink)

This paper is not so much concerned with the question under which circumstances self-defense is justified, but rather with other normative features of self-defense as well as with the source of the self-defense justification. I will argue that the aggressor’s rights-forfeiture alone – and hence the liberty-right of the defender to defend himself – cannot explain the intuitively obvious fact that a prohibition on self-defense would wrong victims of attack. This can only be explained by conceiving of self-defense also as (...) a claim-right. However, I will also argue that a claim-right cannot ground the self-defense justification either. Rather, what grounds the self-defense justification and its particular strength and scope is the fact that self-defense is an act-specific agent-relative prerogative: a defender is allowed to give particularly grave weight to his interest in engaging in self-defense, which distinguishes self-defense from most other acts. This is not the same as saying that he has a right or a liberty to engage in self-defense. Thus, self-defense, understood as a normative concept, is a claim-right, a liberty-right, and an act-specific agent-relative prerogative. (shrink)

The principle of noncombatant immunity prohibits warring parties from intentionally targeting noncombatants. I explicate the moral version of this view and its criticisms by reductive individualists; they argue that certain civilians on the unjust side are morally liable to be lethally targeted to forestall substantial contributions to that war. I then argue that reductivists are mistaken in thinking that causally contributing to an unjust war is a necessary condition for moral liability. Certain noncontributing civilians—notably, war-profiteers—can be morally liable to be (...) lethally targeted. Thus, the principle of noncombatant immunity is mistaken as a moral (though not necessarily as a legal) doctrine, not just because some civilians contribute substantially, but because some unjustly enriched civilians culpably fail to discharge their restitutionary duties to those whose victimization made the unjust enrichment possible. Consequently, the moral criterion for lethal liability in war is even broader than reductive individualists have argued. (shrink)

Minimal responsibility threateners are epistemically justified but mistaken in thinking that imposing a nonnegligible risk on others is permissible. On standard accounts, an MRT forfeits her right not to be defensively killed. I propose an alternative account: an MRT is liable only to the degree of harm equivalent to what she risks causing multiplied by her degree of responsibility. Harm imposed on the MRT above that amount is justified as a lesser evil, relative to allowing the MRT to kill her (...) victim. This hybrid account, which generalizes to those are who are more than minimally responsible, has considerable advantages. (shrink)

In recent years, philosopher Jeff McMahan has solidified an influential view that moral desert is irrelevant to the ethics of self-defense. This work aims to criticize this view by demonstrating that there are cases in which moral desert has a niche position in determining whether it may be permissible to kill a person in self- (or other-)defense. This is done by criticizing McMahan’s Responsibility Account of liability as being overly punitive against minimally responsible threateners (MRTs), and by demonstrating, through reference (...) to Saba Bazargan’s Hybrid Account of liability to defensive harm, that further justification than mere liability is necessary in the justification of killing these kinds of threateners. It is also argued that other kinds of justifications like lesser-evil justifications are not necessarily strong enough to justify killing MRTs, even on top of established liability. This paper puts forward the view that, where a strong enough moral difference between threatener and innocent victim cannot be established, a justification on the basis of the implications of prior moral acts might, on some occasions, give us reasons to kill or not kill MRTs in self-defense. (shrink)

This book is an analysis and evaluation of torture. My take on torture is unique for four reasons. First, it provides a distinct analysis of what torture is. Second, it argues that on non-consequentialist grounds, specifically rights-based ones, torture is sometimes permissible. Third, it argues that torturers are not always vicious. Fourth, it argues that it is plausible that these conclusions apply to some real world cases. In short, it fills the following gap: it evaluates torture from a rights-based perspective (...) and finds that in some cases it is permissible. My book is a unique philosophical exploration of torture. It combines a philosophical analysis of torture with a moral evaluation of it. The philosophical analysis of torture has not received a lot of attention. My analysis defends a minimal view of torture and one that distinguishes the analysis of the concept of torture from the moral evaluation of it. The resulting theory, the minimalist theory, differs noticeably from other analyses. My moral evaluation of torture sharply differs from the rest of the literature. The evaluation focuses on the non-consequentialist approach to morality, that is, it assumes that what makes an action right is not solely whether it brings about the best results. Using the central feature of non-consequentialism, moral rights, I argue that torture is justified in a number of theoretical contexts, including defense, punishment, and when the person to be tortured consents. I then look at the actual world and argue that it is plausible to think that there are real-world cases where torture is justified. My analysis also looks at whether torture is virtuous in an attempt to get at what intuitively repels us about torture. My analysis is not only the first look at the issue, but it also ties in with recent developments in virtue theory. As in the analysis of the permissibility of torture, I try to show that my findings with regard to virtue are not merely of theoretical interest, but are plausible given some real-world cases. (shrink)

This brief reply to Ferzan shows that her recent review of Self-Defense, Necessity, and Punishment is incoherent and completely misrepresents a central claim of mine (to the point of attributing to me the opposite claim than the one I am actually and quite clearly and explicitly making). Her other criticisms fall flat too.

In a recent paper, Jonathan Quong tries to offer further support for “the proposition that there are sometimes agent-relative prerogatives to harm nonliable persons.” In this brief paper, I will demonstrate that Quong’s argument implicitly relies on the premise that the violinist in Thomson’s famous example has a right not to be unplugged. Yet, first, Quong provides no argument in support of this premise; and second, the premise is clearly wrong. Moreover, throughout his paper Quong just question-beggingly and without argument (...) assumes that one cannot lose rights in other ways than by one’s own responsible action. I conclude that Quong has failed to provide further support for his thesis. (shrink)