At some point it seemed like wars became a thing of the past (at least in the Global North), while progress and non-violence triumphed. But now it feels like the wars are back and we need to reflect upon them once again. What can philosophy teach us about wars?
War has not gone away. Even in Europe in the later 1990s, there were wars in what used to be Yugoslavia, and there were wars in Chechnya. Russia has fought smaller-scale wars in Georgia and Crimea. Wars have been very much present in the Middle East and Africa and other areas. When wars are far away, we pay less attention to them. But many people are still being killed in wars in various places.
What some philosophers and legal theorists are trying to do is to better understand the morality of war, when it might be justifiable to resort to war and when it’s unjustifiable to do so. There’s a long tradition of thought about this, known as the just war theory.
Very few people think that any form of violence is unjustifiable. Most people believe that if I see a man about to murder a small child, I am not only permitted but required to use force and violence if that’s necessary, to prevent that person from murdering the child. Children are being murdered in Ukraine right now. And we have to think about what can be done about that.
Some people are involved in war professionally, that is, soldiers. For them, it’s most important to think about the morality of war because they are the ones who are called upon to do the things that are done in war. For instance, in the United States, United Kingdom, Germany, and in many other countries, people who go through the military academies on their way to becoming officers do tend to study the morality of war. It’s certainly true at the United States Military Academy, the United States Naval Academy, the United States Air Force Academy. Michael Walzer’s book Just and Unjust Wars, which has been around since 1977, is a regular part of the curriculum at all of these academies.