Just War Theory Essay

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The Just War Theory: A Catholic’s Perspective
Michael Welch
The just war theory is described by Thomas Massaro in his book Living Justice as the “principle that warfare might be justified under certain conditions” (108). The complexities involved with international relations makes determining a just war very difficult. Even though historically pacifism hasn’t gained much traction within Catholic circles, it currently is gaining popularity with many mainstream Catholics. With so many differing views on military action, one might ask, “What determines a just war? How can we balance the need for peace with self-defense?” An examination of criteria for a just war and critiques written on this topic might shed light on these two questions.
Even though many credit St. Augustine with founding the just war theory, this view is partially misleading. Augustine synthesized ideas from classical Greco-Roman and Christian philosophy to construct his theory, so credit can also be given to philosophers like Aristotle and Cicero. Since then, it has been modified by many notable thinkers such as St. Thomas Aquinas, Hugo Grotius, and Francisco Suarez (Orend). Technicalities aside, Augustine was a pivotal figure in developing our contemporary understanding of this tradition (Massaro 70).
The just war theory can be broken down into three components: jus ad bellum, jus en bello, and jus post bellum. Translated from Latin, these mean “justice before war, justice in war, and justice after war.” In this way, the Catholic Church is able to reconcile Jesus’s lofty teachings about loving your neighbor and causing no harm with protecting the innocent (Massaro 104).
Jus ad bellum is mainly addressed towards people in power, since it is up to them to dec...

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...ace, jus ad bellum lists multiple criteria for ending a war in a way that would facilitate a stable truce between nations. At the end of World War I in 1919, the Treaty of Versailles placed complete responsibility for the war on the German people (Treaty). The tension formed by this treaty eventually led to Hitler’s rise to power and the initiation of World War II.
The Treaty of Versailles is an example of how the neglect of principles proposed by the Catholic Church, namely social restoration, just accords, long-term security and physical reconstruction, can lead to lasting global repercussions and future wars. The sanctions were enforced in the hope of slowing German recovery and eliminating future conflict. However, the United States didn’t sign this treaty because we recognized that it didn’t give the Germans a fair deal or promote long-term security (Treaty).

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