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Simple English definitions for legal terms
just-war doctrine
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A quick definition of just-war doctrine:
The just-war doctrine is a principle that says a war should only happen if there is a good reason for it, and it should be fought with restraint. This means using the least amount of force possible and only when necessary. What is considered a good reason depends on the norms of the time and place. In the past, people have used this doctrine to justify wars for self-defense, to punish wrongs, and over religious differences. However, with the adoption of the U.N. Charter, the idea of a just war has lost its legal significance, and the Charter only allows the use of force in self-defense.
A more thorough explanation:
Definition: Just-war doctrine is a principle in international law that states a war should have a morally and legally sufficient cause and must be conducted with restraint. The reason for the war should be good enough, and the war should only use the least amount of force necessary.
For example, a war waged in self-defense or to punish wrongs can be considered justifiable. However, the use of force should be limited to what is necessary to achieve the goal.
Example: The United States' involvement in World War II is often cited as an example of a just war. The country entered the war after Japan attacked Pearl Harbor, which was seen as a morally and legally sufficient cause. The war was conducted with restraint, and the US only used the amount of force necessary to defeat the Axis powers.
The just-war doctrine has been invoked to justify wars over religious differences, to avenge injuries, and punish wrongs. However, what is considered morally or legally sufficient depends on the norms of a time and place.