サラマンカ学派
The School of Salamanca expanded on Thomistic understanding of natural law and just war. It stated that war is one of the worst evils suffered by mankind. The School's adherents reasoned that war should be a last resort, and only then, when necessary to prevent an even greater evil. Diplomatic resolution is always preferable, even for the more powerful party, before a war is started. Examples of "just war" are: