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The just war theory (Latin : bellum iustum) [1] [2] is a doctrine, also referred to as a tradition, of military ethics that aims to ensure that a war is morally justifiable through a series of criteria, all of which must be met for a war to be considered just. It has been studied by military leaders, theologians, ethicists and policymakers. The criteria are split into two groups: jus ad bellum ("right to go to war") and jus in bello ("right conduct in war"). The first group of criteria concerns the morality of going to war, and the second group of criteria concerns the moral conduct within war. [3] There have been calls for the inclusion of a third category of just war theory ( jus post bellum ) dealing with the morality of post-war settlement and reconstruction. The just war theory postulates the belief that war, while it is terrible but less so with the right conduct, is not always the worst option. The just war theory presents a justifiable means of war with justice being an objective of armed conflict. [4] Important responsibilities, undesirable outcomes, or preventable atrocities may justify war. [3]
Opponents of the just war theory may either be inclined to a stricter pacifist standard (proposing that there has never been nor can there ever be a justifiable basis for war) or they may be inclined toward a more permissive nationalist standard (proposing that a war need only to serve a nation's interests to be justifiable). In many cases, philosophers state that individuals do not need to be plagued by a guilty conscience if they are required to fight. A few philosophers ennoble the virtues of the soldier while they also declare their apprehensions for war itself. [5] A few, such as Rousseau, argue for insurrection against oppressive rule.
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. The just war tradition also considers the writings of various philosophers and lawyers through history, and examines both their philosophical visions of war's ethical limits and whether their thoughts have contributed to the body of conventions that have evolved to guide war and warfare. [6]
In the twenty-first century there has been significant debate between traditional just war theorists, who largely support the existing law of war and develop arguments to support it, and revisionists who reject many traditional assumptions, although not necessarily advocating a change in the law. [7] [8]
A 2017 study found that the just war tradition can be traced as far back as to Ancient Egypt. [9] Egyptian ethics of war usually centered on three main ideas, these including the cosmological role of Egypt, the pharaoh as a divine office and executor of the will of the gods, and the superiority of the Egyptian state and population over all other states and peoples. Egyptian political theology held that the pharaoh had the exclusive legitimacy in justly initiating a war, usually claimed to carry out the will of the gods. Senusret I, in the Twelfth Dynasty, claimed, "I was nursed to be a conqueror...his [Atum's] son and his protector, he gave me to conquer what he conquered." Later pharaohs also considered their sonship of the god Amun-Re as granting them absolute ability to declare war on the deity's behalf. Pharaohs often visited temples prior to initiating campaigns, where the pharaoh was believed to receive their commands of war from the deities. For example, Kamose claimed that "I went north because I was strong (enough) to attack the Asiatics through the command of Amon, the just of counsels." A stele erected by Thutmose III at the Temple of Amun at Karnak "provides an unequivocal statement of the pharaoh's divine mandate to wage war on his enemies." As the period of the New Kingdom progressed and Egypt heightened its territorial ambition, so did the invocation of just war aid the justification of these efforts. The universal principle of Maat, signifying order and justice, was central to the Egyptian notion of just war and its ability to guarantee Egypt virtually no limits on what it could take, do, or use to guarantee the ambitions of the state. [9]
The Indian Hindu epic, the Mahabharata , offers the first written discussions of a "just war" ( dharma-yuddha or "righteous war"). In it, one of five ruling brothers ( Pandavas ) asks if the suffering caused by war can ever be justified. A long discussion then ensues between the siblings, establishing criteria like proportionality (chariots cannot attack cavalry, only other chariots; no attacking people in distress), just means (no poisoned or barbed arrows), just cause (no attacking out of rage), and fair treatment of captives and the wounded. [10]
In Sikhism, the term dharamyudh describes a war that is fought for just, righteous or religious reasons, especially in defence of one's own beliefs. Though some core tenets in the Sikh religion are understood to emphasise peace and nonviolence, especially before the 1606 execution of Guru Arjan by Mughal Emperor Jahangir, [11] military force may be justified if all peaceful means to settle a conflict have been exhausted, thus resulting in a dharamyudh. [12]
Chinese philosophy produced a massive body of work on warfare, much of it during the Zhou dynasty, especially the Warring States era. War was justified only as a last resort and only by the rightful sovereign; however, questioning the decision of the emperor concerning the necessity of a military action was not permissible. The success of a military campaign was sufficient proof that the campaign had been righteous. [13]
Japan did not develop its own doctrine of just war but between the 5th and the 7th centuries drew heavily from Chinese philosophy, and especially Confucian views. As part of the Japanese campaign to take the northeastern island Honshu, Japanese military action was portrayed as an effort to "pacify" the Emishi people, who were likened to "bandits" and "wild-hearted wolf cubs" and accused of invading Japan's frontier lands. [14]
The notion of just war in Europe originates and is developed first in ancient Greece and then in the Roman Empire. [15] [16] [17]
It was Aristotle who first introduced the concept and terminology to the Hellenic world that called war a last resort requiring conduct that would allow the restoration of peace. Aristotle argues that the cultivation of a military is necessary and good for the purpose of self-defense, not for conquering: "The proper object of practising military training is not in order that men may enslave those who do not deserve slavery, but in order that first they may themselves avoid becoming enslaved to others" (Politics, Book 7). [18]
In ancient Rome, a "just cause" for war might include the necessity of repelling an invasion, or retaliation for pillaging or a breach of treaty. [19] War was always potentially nefas ("wrong, forbidden"), and risked religious pollution and divine disfavor. [20] A "just war" (bellum iustum) thus required a ritualized declaration by the fetial priests. [21] More broadly, conventions of war and treaty-making were part of the ius gentium , the "law of nations", the customary moral obligations regarded as innate and universal to human beings. [22]
Christian theory of the Just War begins around the time of Augustine of Hippo. [23] The Just War theory, with some amendments, is still used by Christians today as a guide to whether or not a war can be justified. Christians may argue "Sometimes war may be necessary and right, even though it may not be good." In the case of a country that has been invaded by an occupying force, war may be the only way to restore justice. [24]
Saint Augustine held that individuals should not resort immediately to violence, but God has given the sword to government for a good reason (based upon Romans 13:4). In Contra Faustum Manichaeum book 22 sections 69–76, Augustine argues that Christians, as part of a government, need not be ashamed of protecting peace and punishing wickedness when they are forced to do so by a government. Augustine asserted that was a personal and philosophical stance: "What is here required is not a bodily action, but an inward disposition. The sacred seat of virtue is the heart." [25]
Nonetheless, he asserted, peacefulness in the face of a grave wrong that could be stopped by only violence would be a sin. Defense of oneself or others could be a necessity, especially when it is authorized by a legitimate authority:
They who have waged war in obedience to the divine command, or in conformity with His laws, have represented in their persons the public justice or the wisdom of government, and in this capacity have put to death wicked men; such persons have by no means violated the commandment, "Thou shalt not kill." [26]
While not breaking down the conditions necessary for war to be just, Augustine nonetheless originated the very phrase itself in his work The City of God:
But, say they, the wise man will wage Just Wars. As if he would not all the rather lament the necessity of just wars, if he remembers that he is a man; for if they were not just he would not wage them, and would therefore be delivered from all wars. [26]
Augustine further taught:
No war is undertaken by a good state except on behalf of good faith or for safety. [27]
J. Mark Mattox writes,
In terms of the traditional notion of jus ad bellum (justice of war, that is, the circumstances in which wars can be justly fought), war is a coping mechanism for righteous sovereigns who would ensure that their violent international encounters are minimal, a reflection of the Divine Will to the greatest extent possible, and always justified. In terms of the traditional notion of jus in bello (justice in war, or the moral considerations which ought to constrain the use of violence in war), war is a coping mechanism for righteous combatants who, by divine edict, have no choice but to subject themselves to their political masters and seek to ensure that they execute their war-fighting duty as justly as possible. [28]
Isidore of Seville writes:
Those wars are unjust which are undertaken without cause. For aside from vengeance or to fight off enemies no just war can be waged. [29]
The medieval Peace of God (Latin: pax dei) was a 10th century mass movement in Western Europe instigated by the clergy that granted immunity from violence for non-combatants.
Starting in the 11th Century, the Truce of God (Latin: treuga dei) involved Church rules that successfully limited when and where fighting could occur: Catholic forces (e.g. of warring barons) could not fight each other on Sundays, Thursdays, holidays, the entirety of Lent and Advent and other times, severely disrupting the conduct of wars. The 1179 Third Council of the Lateran adopted a version of it for the whole church.
The just war theory by Thomas Aquinas has had a lasting impact on later generations of thinkers and was part of an emerging consensus in Medieval Europe on just war. [30] In the 13th century Aquinas reflected in detail on peace and war. Aquinas was a Dominican friar and contemplated the teachings of the Bible on peace and war in combination with ideas from Aristotle, Plato, Socrates, Saint Augustine and other philosophers whose writings are part of the Western canon. Aquinas' views on war drew heavily on the Decretum Gratiani , a book the Italian monk Gratian had compiled with passages from the Bible. After its publication in the 12th century, the Decretum Gratiani had been republished with commentary from Pope Innocent IV and the Dominican friar Raymond of Penafort. Other significant influences on Aquinas just war theory were Alexander of Hales and Henry of Segusio. [31]
In Summa Theologica Aquinas asserted that it is not always a sin to wage war, and he set out criteria for a just war. According to Aquinas, three requirements must be met. Firstly, the war must be waged upon the command of a rightful sovereign. Secondly, the war needs to be waged for just cause, on account of some wrong the attacked have committed. Thirdly, warriors must have the right intent, namely to promote good and to avoid evil. [32] [33] Aquinas came to the conclusion that a just war could be offensive and that injustice should not be tolerated so as to avoid war. Nevertheless, Aquinas argued that violence must only be used as a last resort. On the battlefield, violence was only justified to the extent it was necessary. Soldiers needed to avoid cruelty and a just war was limited by the conduct of just combatants. Aquinas argued that it was only in the pursuit of justice, that the good intention of a moral act could justify negative consequences, including the killing of the innocent during a war. [34]
Various Renaissance humanists promoted Pacificist views.
A leading humanist writer after the Reformation was legal theorist Hugo Grotius, whose De jura belli ac pacis re-considered Just War and fighting wars justly.
At the beginning of the First World War, a group of theologians in Germany published a manifesto that sought to justify the actions of the German government. At the British government's request, Randall Davidson, Archbishop of Canterbury, took the lead in collaborating with a large number of other religious leaders, including some with whom he had differed in the past, to write a rebuttal of the Germans' contentions. Both German and British theologians based themselves on the just war theory, each group seeking to prove that it applied to the war waged by its own side. [36]
The just war doctrine of the Catholic Church found in the 1992 Catechism of the Catholic Church , in paragraph 2309, lists four strict conditions for "legitimate defense by military force:" [37] [38]
The Compendium of the Social Doctrine of the Church elaborates on the just war doctrine in paragraphs 500 to 501, while citing the Charter of the United Nations: [39]
If this responsibility justifies the possession of sufficient means to exercise this right to defense, States still have the obligation to do everything possible "to ensure that the conditions of peace exist, not only within their own territory but throughout the world". It is important to remember that "it is one thing to wage a war of self-defense; it is quite another to seek to impose domination on another nation. The possession of war potential does not justify the use of force for political or military objectives. Nor does the mere fact that war has unfortunately broken out mean that all is fair between the warring parties".
The Charter of the United Nations ... is based on a generalized prohibition of a recourse to force to resolve disputes between States, with the exception of two cases: legitimate defence and measures taken by the Security Council within the area of its responsibilities for maintaining peace. In every case, exercising the right to self-defence must respect "the traditional limits of necessity and proportionality".
Therefore, engaging in a preventive war without clear proof that an attack is imminent cannot fail to raise serious moral and juridical questions. International legitimacy for the use of armed force, on the basis of rigorous assessment and with well-founded motivations, can only be given by the decision of a competent body that identifies specific situations as threats to peace and authorizes an intrusion into the sphere of autonomy usually reserved to a State.
Pope John Paul II in an address to a group of soldiers said the following: [40]
Peace, as taught by Sacred Scripture and the experience of men itself, is more than just the absence of war. And the Christian is aware that on earth a human society that is completely and always peaceful is, unfortunately, an utopia and that the ideologies which present it as easily attainable only nourish vain hopes. The cause of peace will not go forward by denying the possibility and the obligation to defend it.
The War and Peace section in the Basis of the Social Concept of the Russian Orthodox Church is crucial for understanding the Russian Orthodox Church's attitude towards war. The document offers criteria of distinguishing between an aggressive war, which is unacceptable, and a justified war, attributing the highest moral and sacred value of military acts of bravery to a true believer who participates in a justified war. Additionally, the document considers the just war criteria as developed in Western Christianity to be eligible for Russian Orthodoxy; therefore, the justified war theory in Western theology is also applicable to the Russian Orthodox Church. [41]
In the same document, it is stated that wars have accompanied human history since the fall of man, and according to the gospel, they will continue to accompany it. While recognizing war as evil, the Russian Orthodox Church does not prohibit its members from participating in hostilities if there is the security of their neighbours and the restoration of trampled justice at stake. War is considered to be necessary but undesirable. It is also stated that the Russian Orthodox Church has had profound respect for soldiers who gave their lives to protect the life and security of their neighbours. [42]
The just war theory, propounded by the medieval Christian philosopher Thomas Aquinas, was developed further by legal scholars in the context of international law. Cardinal Cajetan, the jurist Francisco de Vitoria, the two Jesuit priests Luis de Molina and Francisco Suárez, as well as the humanist Hugo Grotius and the lawyer Luigi Taparelli were most influential in the formation of a just war tradition. The just war tradition, which was well established by the 19th century, found its practical application in the Hague Peace Conferences (1899 and 1907) and in the founding of the League of Nations in 1920. After the United States Congress declared war on Germany in 1917, Cardinal James Gibbons issued a letter that all Catholics were to support the war [43] because "Our Lord Jesus Christ does not stand for peace at any price... If by Pacifism is meant the teaching that the use of force is never justifiable, then, however well meant, it is mistaken, and it is hurtful to the life of our country." [44]
Armed conflicts such as the Spanish Civil War, World War II and the Cold War were, as a matter of course, judged according to the norms (as established in Aquinas' just war theory) by philosophers such as Jacques Maritain, Elizabeth Anscombe and John Finnis. [30]
The first work dedicated specifically to just war was the 15th-century sermon De bellis justis of Stanisław of Skarbimierz (1360–1431), who justified war by the Kingdom of Poland against the Teutonic Knights. [45] Francisco de Vitoria criticized the conquest of America by the Spanish conquistadors on the basis of just-war theory. [46] With Alberico Gentili and Hugo Grotius, just war theory was replaced by international law theory, codified as a set of rules, which today still encompass the points commonly debated, with some modifications. [47]
Just-war theorists combine a moral abhorrence towards war with a readiness to accept that war may sometimes be necessary. The criteria of the just-war tradition act as an aid in determining whether resorting to arms is morally permissible. Just-war theories aim "to distinguish between justifiable and unjustifiable uses of organized armed forces"; they attempt "to conceive of how the use of arms might be restrained, made more humane, and ultimately directed towards the aim of establishing lasting peace and justice". [48]
The just war tradition addresses the morality of the use of force in two parts: when it is right to resort to armed force (the concern of jus ad bellum ) and what is acceptable in using such force (the concern of jus in bello ). [49]
In 1869 the Russian military theorist Genrikh Antonovich Leer theorized on the advantages and potential benefits of war. [50]
The Soviet leader Vladimir Lenin defined only three types of just war. [51]
But picture to yourselves a slave-owner who owned 100 slaves warring against a slave-owner who owned 200 slaves for a more "just" distribution of slaves. Clearly, the application of the term "defensive" war, or war "for the defense of the fatherland" in such a case would be historically false, and in practice would be sheer deception of the common people, of philistines, of ignorant people, by the astute slaveowners. Precisely in this way are the present-day imperialist bourgeoisie deceiving the peoples by means of "national ideology" and the term "defense of the fatherland" in the present war between slave-owners for fortifying and strengthening slavery. [52]
The anarcho-capitalist scholar Murray Rothbard (1926-1995) stated that "a just war exists when a people tries to ward off the threat of coercive domination by another people, or to overthrow an already-existing domination. A war is unjust, on the other hand, when a people try to impose domination on another people or try to retain an already-existing coercive rule over them." [53]
Jonathan Riley-Smith writes:
The consensus among Christians on the use of violence has changed radically since the crusades were fought. The just war theory prevailing for most of the last two centuries—that violence is an evil that can, in certain situations, be condoned as the lesser of evils—is relatively young. Although it has inherited some elements (the criteria of legitimate authority, just cause, right intention) from the older war theory that first evolved around AD 400, it has rejected two premises that underpinned all medieval just wars, including crusades: first, that violence could be employed on behalf of Christ's intentions for mankind and could even be directly authorized by him; and second, that it was a morally neutral force that drew whatever ethical coloring it had from the intentions of the perpetrators. [54]
The just war theory has two sets of criteria, the first establishing jus ad bellum (the right to go to war), and the second establishing jus in bello (right conduct within war). [55]
The just war theory directs jus ad bellum to norms that aim to require certain circumstances to enable the right to go to war. [56]
Once war has begun, just war theory (jus in bello) also directs how combatants are to act or should act:
In recent years, some theorists, such as Gary Bass, Louis Iasiello and Brian Orend, have proposed a third category within the just war theory. "Jus post bellum is described by some scholars as a new “discipline,” or as “a new category of international law currently under construction". [63] Jus post bellum [64] concerns justice after a war, including peace treaties, reconstruction, environmental remediation, war crimes trials, and war reparations. Jus post bellum has been added to deal with the fact that some hostile actions may take place outside a traditional battlefield. Jus post bellum governs the justice of war termination and peace agreements, as well as the prosecution of war criminals, and publicly labelled terrorists. The idea has largely been added to help decide what to do if there are prisoners that have been taken during battle. It is, through government labelling and public opinion, that people use jus post bellum to justify the pursuit of labelled terrorist for the safety of the government's state in a modern context. The actual fault lies with the aggressor and so by being the aggressor, they forfeit their rights for honourable treatment by their actions. That theory is used to justify the actions taken by anyone fighting in a war to treat prisoners outside of war. [65] [66]
There are two altering views related to the just war theory that scholars align with, which are traditionalists and revisionists. The debates between these different viewpoints rest on the moral responsiblites of actors in jus in bello. [67]
In the just war theory as it pertains to jus in bello, traditionalist scholars view that the two principles, jus ad bellum and jus in bello, are distinct in which actors in war are morally responsible. The traditional view places accountability on leaders who start the war, while soldiers are accountable for actions breaking jus in bello. [68]
Revisionist scholars view that moral responsibility in conduct of war is placed on individual soldiers who participate in war, even if they follow the rules associated with jus in bello. Soldiers that participate in unjust wars are morally responsible. The revisionist view is based on an individual level, rather than on a collective whole. [69] [67] [68]
Jurisprudence, also known as theory of law or philosophy of law, is the examination in a general perspective of what law is and what it ought to be. It investigates issues such as the definition of law; legal validity; legal norms and values; as well as the relationship between law and other fields of study, including economics, ethics, history, sociology, and political philosophy.
Natural law is a system of law based on a close observation of natural order and human nature, from which values, thought by natural law's proponents to be intrinsic to human nature, can be deduced and applied independently of positive law. According to the theory of law called jusnaturalism, all people have inherent rights, conferred not by act of legislation but by "God, nature, or reason". Natural law theory can also refer to "theories of ethics, theories of politics, theories of civil law, and theories of religious morality".
The law of war is a component of international law that regulates the conditions for initiating war and the conduct of hostilities. Laws of war define sovereignty and nationhood, states and territories, occupation, and other critical terms of law.
The principle of double effect – also known as the rule of double effect, the doctrine of double effect, often abbreviated as DDE or PDE, double-effect reasoning, or simply double effect – is a set of ethical criteria which Christian philosophers have advocated for evaluating the permissibility of acting when one's otherwise legitimate act may also cause an effect one would otherwise be obliged to avoid. The first known example of double-effect reasoning is Thomas Aquinas' treatment of homicidal self-defense, in his work Summa Theologica.
Virtue ethics is a philosophical approach that treats virtue and character as the primary subjects of ethics, in contrast to other ethical systems that put consequences of voluntary acts, principles or rules of conduct, or obedience to divine authority in the primary role.
Jus ad bellum, literally "right to war" in Latin, refers to "the conditions under which States may resort to war or to the use of armed force in general". Jus ad bellum is one pillar of just war theory. Just war theory states that war should only be condoned under 'just' conditions. Jus ad bellum simply limits the causes for which war can be considered justifiable. The other parts of just war theory include jus in bello and jus post bellum.
Tyrannicide or tyrannomachia is the killing or assassination of a tyrant or unjust ruler, purportedly for the common good, and usually by one of the tyrant's subjects. Tyrannicide was legally permitted and encouraged in Classical Athens. Often, the term "tyrant" was a justification for political murders by rivals, but in some exceptional cases students of Platonic philosophy risked their lives against tyrants. The killing of Clearchus of Heraclea in 353 BC by a cohort led by his own court philosopher is considered a sincere tyrannicide. A person who carries out a tyrannicide is also called a "tyrannicide".
The philosophy of war is the area of philosophy devoted to examining issues such as the causes of war, the relationship between war and human nature, and the ethics of war. Certain aspects of the philosophy of war overlap with the philosophy of history, political philosophy, international relations and the philosophy of law.
Christian ethics, also known as moral theology, is a multi-faceted ethical system. It is a virtue ethic, which focuses on building moral character, and a deontological ethic which emphasizes duty. It also incorporates natural law ethics, which is built on the belief that it is the very nature of humans – created in the image of God and capable of morality, cooperation, rationality, discernment and so on – that informs how life should be lived, and that awareness of sin does not require special revelation. Other aspects of Christian ethics, represented by movements such as the social Gospel and liberation theology, may be combined into a fourth area sometimes called prophetic ethics.
Catholic peace traditions begin with its biblical and classical origins and continue on to the current practice in the twenty-first century. Because of its long history and breadth of geographical and cultural diversity, this Catholic tradition encompasses many strains and influences of both religious and secular peacemaking and many aspects of Christian pacifism, just war and nonviolence.
Jus post bellum is a concept that deals with the morality of the termination phase of war, including the responsibility to rebuild. The idea has some historical pedigree as a concept in just war theory. In modern times, it has been developed by a number of just war theorists and international lawyers. However, the concept means different things to the contributors in each field. For lawyers, the concept is much less clearly defined, and many have rejected the usefulness of the concept altogether. The concept continues to attract scholarly interest in the field of international humanitarian law. A famous example of Jus post bellum is the reconstruction of Germany by the Allies post World War 2.
Robert L. Holmes is a Professor Emeritus of Philosophy at the University of Rochester, and an expert on issues of peace and nonviolence. Holmes specializes in ethics, and in social and political philosophy. He has written numerous articles and several books on those topics, and has been invited to address national and international conferences.
Just and Unjust Wars: A Moral Argument with Historical Illustrations is a 1977 book by the philosopher Michael Walzer. Published by Basic Books, it is still in print, now as part of the Basic Books Classics Series. A second edition was published in 1992, a third edition in 2000, a fourth edition in 2006, and a fifth edition in 2015. The book resulted from Walzer's reflections on the Vietnam War.
Christians have had diverse attitudes towards violence and nonviolence over time. Both currently and historically, there have been four attitudes towards violence and war and four resulting practices of them within Christianity: non-resistance, Christian pacifism, just war, and preventive war. In the Roman Empire, the early church adopted a nonviolent stance when it came to war because the imitation of Jesus's sacrificial life was preferable to it. The concept of "Just War", the belief that limited uses of war were acceptable, originated in the writings of earlier non-Christian Roman and Greek thinkers such as Cicero and Plato. Later, this theory was adopted by Christian thinkers such as St Augustine, who like other Christians, borrowed much of the just war concept from Roman law and the works of Roman writers like Cicero. Even though "Just War" concept was widely accepted early on, warfare was not regarded as a virtuous activity and expressing concern for the salvation of those who killed enemies in battle, regardless of the cause for which they fought, was common. Concepts such as "Holy war", whereby fighting itself might be considered a penitential and spiritually meritorious act, did not emerge before the 11th century.
Tranquillitas ordinis is a Latin phrase meaning the 'tranquility of order' or 'well-ordered concord'. The term is associated with the Roman Catholic tradition of just war theory, and is found in the writings of Augustine of Hippo and Thomas Aquinas. Depending on the author and the context, the term is used to convey various meanings in theology and politics. These meanings include the divine order imposed on the universe and a theoretical framework for peace. Tranquillitas ordinis remains a cornerstone of Catholic teaching on peace. It is included in the framework laid out by Pope John XXIII in his 1963 encyclical, Pacem in terris, and is a featured topic at The Global Quest for Tranquillitas Ordinis, a conference organized by the Pontifical Academy of Social Sciences.
Targeted Killings: Law and Morality in an Asymmetrical World is a non-fiction compilation book about targeted killing edited by Claire Finkelstein, Jens David Ohlin, and Andrew Altman. It was published by Oxford University Press in 2012. The book grew out of contributions by the authors to a conference in April 2011 at the University of Pennsylvania Law School. Targeted Killings features eighteen essays in five sections arranged by topic. The work argues that after the 11 September attacks by Al-Qaeda in 2001, the United States and other countries began to see the tactic of targeted killing differently. The practice of targeted killing had previously been accepted in situations of self-defence in military settings; after 11 September 2001 it was used to kill non-combatants and those not directly involved in a particular armed force.
In just war theory, a supreme emergency is a situation where a state faces an existential threat from an agressor, which scholars like Michael Walzer and John Rawls argue justifies otherwise unjust action.
The moral equality of combatants (MEC) or moral equality of soldiers is the principle that soldiers fighting on both sides of a war are equally honorable, unless they commit war crimes, regardless of whether they fight for a just cause. MEC is a key element underpinning international humanitarian law (IHL)—which applies the rules of war equally to both sides—and traditional just war theory. According to philosopher Henrik Syse, MEC presents a serious quandary because "it makes as little practical sense to ascribe blame to individual soldiers for the cause of the war in which they fight as it makes theoretical sense to hold the fighters on the two sides to be fully morally equal". The moral equality of combatants has been cited in relation to the Israeli–Palestinian conflict or the U.S.-led wars in Iraq and Afghanistan.
Revisionist just war theory is a development of just war theory that, unlike traditional just war theory, seeks to integrate jus ad bellum and jus in bello, therefore rejecting many traditional beliefs such as moral equality of combatants. Opposing traditionalists such as Michael Walzer, revisionists include Jeff McMahan, Cécile Fabre, Bradley J. Strawser, and David Rodin.
The Ethics of Political Commemoration is a framework that seeks to improve remembrance of the past, so that it contributes to a better future. As a moral framework, it is adapted from the Just War tradition, reflecting that remembrance is often conducted with political – and sometimes coercive – intent. Examples of such remembrance includes public events, monuments, museums, street names, among many others.
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