Just War Theory
Just war theory deals with the justification of how and why wars are fought. The justification can be either theoretical or historical. The theoretical aspect is concerned with ethically justifying war and the forms that warfare may or may not take. The historical aspect, or the “just war tradition,” deals with the historical body of rules or agreements that have applied in various wars across the ages. For instance, international agreements such as the Geneva and Hague conventions are historical rules aimed at limiting certain kinds of warfare which lawyers may refer to in prosecuting transgressors, but it is the role of ethics to examine these institutional agreements for their philosophical coherence as well as to inquire into whether aspects of the conventions ought to be changed. The just war tradition may also consider the thoughts of various philosophers and lawyers through the ages and examine both their philosophical visions of war’s ethical limits (or absence of) and whether their thoughts have contributed to the body of conventions that have evolved to guide war and warfare.
Table of Contents
- Introduction
- The Jus Ad Bellum Convention
- The Principles Of Jus In Bello
- Jus post bellum
- Conclusion
- References and Further Readin
1. Introduction
Historically, the just war tradition–a set of mutually agreed rules of combat—may be said to commonly evolve between two culturally similar enemies. That is, when an array of values are shared between two warring peoples, we often find that they implicitly or explicitly agree upon limits to their warfare. But when enemies differ greatly because of different religious beliefs, race, or language, and as such they see each other as “less than human”, war conventions are rarely applied. It is only when the enemy is seen to be a people, sharing a moral identity with whom one will do business in the following peace, that tacit or explicit rules are formed for how wars should be fought and who they should involve and what kind of relations should apply in the aftermath of war. In part, the motivation for forming or agreeing to certain conventions, can be seen as mutually benefiting—preferable, for instance, to the deployment of any underhand tactics or weapons that may provoke an indefinite series of vengeance acts, or the kinds of action that have proved to be detrimental to the political or moral interests to both sides in the past.
Regardless of the conventions that have historically formed, it has been the concern of the majority of just war theorists that the lack of rules to war or any asymmetrical morality between belligerents should be denounced, and that the rules of war should apply to all equally. That is, just war theory should be universal, binding on all and capable in turn of appraising the actions of all parties over and above any historically formed conventions.
The just war tradition is indeed as old as warfare itself. Early records of collective fighting indicate that some moral considerations were used by warriors to limit the outbreak or to rein in the potential devastation of warfare. They may have involved consideration of women and children or the treatment of prisoners (enslaving them rather than killing them, or ransoming or exchanging them). Commonly, the earlier traditions invoked considerations of honor: some acts in war have always been deemed dishonorable, whilst others have been deemed honorable. However, what is “honorable” is often highly specific to culture: for instance, a suicidal attack or defense may be deemed the honorable act for one people but ludicrous to another. Robinson (2006) notes that honor conventions are also contextually slippery, giving way to pragmatic or military interest when required. Whereas the specifics of what is honorable differ with time and place, the very fact that one moral virtue is alluded to in the great literature (for example, Homer’s
Iliad) is sufficient for us to note that warfare has been infused with some moral concerns from the beginning rather than war being a mere Macbethian bloodbath.
The just war theory also has a long history. Parts of the Bible hint at ethical behavior in war and concepts of just cause, typically announcing the justice of war by divine intervention; the Greeks may have paid lip service to the gods, but, as with the Romans, practical and political issues tended to overwhelm any fledgling legal conventions: that is, interests of state or
Realpolitik (the theory known as
political realism would take precedence in declaring and waging war. Nonetheless, this has also been the reading of political realists, who enjoy Thucydides’
History of the Peloponnesian War as an example of why war is necessarily the extension of politics and hence permeated by hard-nosed state interest rather than “lofty” pretensions to moral behavior.
Although
St. Augustine provided comments on the morality of war from the Christian perspective (railing against the love of violence that war can engender) as did several Arabic commentators in the intellectual flourishing from the 9th to 12th centuries, but the most systematic exposition in the Western tradition and one that still attracts attention was outlined by Saint
Thomas Aquinas in the 13th century. In the
Summa Theologicae, Aquinas presents the general outline of what becomes the traditional just war theory as discussed in modern universities. He discusses not only the justification of war but also the kinds of activity that are permissible (for a Christian) in war (see below). Aquinas’s thoughts become the model for later Scholastics and Jurists to expand and to gradually to universalize beyond Christendom – notably, for instance, in relations with the peoples of America following European incursions into the continent. The most important of these writers are: Francisco de Vitoria (1486-1546), Francisco Suarez (1548-1617), Hugo Grotius (1583-1645), Samuel Pufendorf (1632-1704), Christian Wolff (1679-1754), and Emerich de Vattel (1714-1767).
In the twentieth century, just war theory has undergone a revival mainly in response to the invention of nuclear weaponry and American involvement in the Vietnam war. The most important contemporary texts include Michael Walzer’s
Just and Unjust Wars (1977), Barrie Paskins and Michael Dockrill
The Ethics of War (1979), Richard Norman
Ethics, Killing, and War (1995), Brian Orend
War and International Justice (2001) and Michael Walzer on
War and Justice (2001), as well as seminal articles by Thomas Nagel “War and Massacre”, Elizabeth Anscombe “War and Murder”, and a host of others, commonly found in the journals
Ethics or
The Journal of Philosophy and Public Affairs.
Since the terrorist attacks on the USA on 9/11 in 2001, academics have turned their attention to just war once again with international, national, academic, and military conferences developing and consolidating the theoretical aspects of the conventions. Just war theory has become a popular topic in International Relations, Political Science, Philosophy, Ethics, and Military History courses. Conference proceedings are regularly published, offering readers a breadth of issues that the topic stirs: for example, Alexander Moseley and Richard Norman, eds.
Human Rights and Military Intervention, Paul Robinson, ed.,
Just War in a Comparative Perspective, Alexsander Jokic, ed.,
War Crimes and Collective Wrongdoing. What has been of great interest is that in the headline wars of the past decade, the dynamic interplay of the rules and conventions of warfare not only remain intact on the battlefield but their role and hence their explication have been awarded a higher level of scrutiny and debate. In the political circles, justification of war still requires even in the most critical analysis a superficial acknowledgement of justification. On the ground, generals have extolled their troops to adhere to the rules, soldiers are taught the just war conventions in the military academies (for example, explicitly through military ethics courses or implicitly through veterans’ experiences). Yet despite the emphasis on abiding by war’s conventions, war crimes continue – genocidal campaigns have been waged by mutually hating peoples, leaders have waged total war on ethnic groups within or without their borders, and individual soldiers or guerilla bands have committed atrocious, murderous, or humiliating acts on their enemy. But, arguably, such acts do remain atrocities by virtue of the just war conventions that some things in war are deemed to be inexcusable, regardless of the righteousness of the cause or the noise and fog of battle.
Yet increasingly, the rule of law – the need to hold violators and transgressors responsible for their actions in war and therefore after the battle – is making headway onto the battlefield. In chivalrous times, the Christian crusader could seek priestly absolution for atrocities committed in war, a stance supported by Augustine for example; today, the law courts are seemingly less forgiving: a violation of the conventions assumes that the soldier is responsible and accountable and should be charged for a crime. Nonetheless, the idealism of those who seek the imposition of law and responsibility on the battlefield (cf. Geoffrey Robertson’s
Crimes Against Humanity), often runs ahead of the traditions and customs, or plain state interests, that demean or weaken the
justum bellum that may exist between warring factions. And in some cases, no just war conventions and hence no potential for legal acknowledgement of malfeasance, exist at all; in such cases, the ethic of war is considered, or is implicitly held to be, beyond the norms of peaceful ethics and therefore deserving a separate moral realm where “fair is foul and foul is fair” (Shakespeare,
Macbeth I.i). In such examples (e.g, Rwanda, 1994), a people’s justification of destructiveness and killing to whatever relative degree they hold to be justifiable triumphs over attempts to establish the laws of peaceful interaction into this separate bloody realm; and in some wars, people fighting for their land or nation prefer to pick up the cudgel rather than the rapier, as Leo Tolstoy notes in
War and Peace (Book 4.Ch.2), to sidestep the etiquette or war in favor securing their land from occupational or invading forces.
The continued brutality of war in the face of conventions and courts of international law lead some to maintain that the application of morality to war is a nonstarter: state interest or military exigency would always overwhelm moral concerns. But there are those of a more skeptical persuasion who do not believe that morality can or should exist in war: its very nature precludes ethical concerns. But as there are several ethical viewpoints, there are also several common reasons laid against the need or the possibility of morality in war. Generally, consequentialists and act utilitarians may claim that if military victory is sought then all methods should be employed to ensure it is gained at a minimum of expense and time. Arguments from ‘military necessity’ are of this type; for example, to defeat Germany in World War II, it was deemed necessary to bomb civilian centers, or in the US Civil War, for General Sherman to burn Atlanta. However, intrinsicists (who claim that there are certain acts that are good or bad in themselves) may also decree that no morality can exist in the state of war: they may claim that it can only exist in a peaceful situation in which, for instance, recourse exists to conflict resolving institutions. Alternatively, intrinsicists may claim that possessing a just cause (the argument from righteousness) is a sufficient condition for pursuing whatever means are necessary to gain a victory or to punish an enemy. A different skeptical argument, one advanced by Michael Walzer, is that the invention of nuclear weapons alters war so much that our notions of morality—and hence just war theories—become redundant. However, against Walzer, it can be reasonably argued that although such weapons change the nature of warfare (for example, the timing, range, and potential devastation) they do not dissolve the need to consider their use within a moral framework: a nuclear warhead remains a weapon and weapons can be morally or immorally employed.
Whilst skeptical positions may be derived from consequentialist and intrinsicist positions, they need not be. Consequentialists can argue that there are long-term benefits to having a war convention. For example, by fighting cleanly, both sides can be sure that the war does not escalate, thus reducing the probability of creating an incessant war of counter-revenges. Intrinsicists, on the other hand, can argue that certain spheres of life ought never to be targeted in war; for example, hospitals and densely populated suburbs.
The inherent problem with both ethical models is that they become either vague or restrictive when it comes to war. Consequentialism is an open-ended model, highly vulnerable to pressing military or political needs to adhere to any code of conduct in war: if more will be gained from breaking the rules than will be lost, the consequentialist cannot but demur to military “necessity.” On the other hand, intrinsicism can be so restrictive that it permits no flexibility in war: whether it entails a Kantian thesis of dutifully respecting others or a classical rights position, intrinsicism produces an inflexible model that would restrain warriors’ actions to the targeting of permissible targets only. In principle such a prescription is commendable, yet the nature of war is not so clean cut when military targets can be hidden amongst civilian centers.
Against these two ethical positions, just war theory offers a series of principles that aim to retain a plausible moral framework for war. From the just war (
justum bellum) tradition, theorists distinguish between the rules that govern the justice of war (
jus ad bellum) from those that govern just and fair conduct in war (
jus In bello) and the responsibility and accountability of warring parties after the war (
jus post bellum). The three aspects are by no means mutually exclusive, but they offer a set of moral guidelines for waging war that are neither unrestricted nor too restrictive. The problem for ethics involves expounding the guidelines in particular wars or situations.
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Just War Theory | Internet Encyclopedia of Philosophy