There are wars in pursuit of interest. In these wars, nations pursue economic or strategic ends to protect the nation or expand its power. There are also wars of ideology, designed to spread some idea of “the good,” whether this good is religious or secular. The two obviously can be intertwined, such that a war designed to spread an ideology also strengthens the interests of the nation spreading the ideology.Since World War II, a new class of war has emerged that we might call humanitarian wars — wars in which the combatants claim to be fighting neither for their national interest nor to impose any ideology, but rather to prevent inordinate human suffering. In Kosovo and now in Libya, this has been defined as stopping a government from committing mass murder. But it is not confined to that: In the 1990s, the U.S. intervention in Somalia was intended to alleviate a famine while the invasion of Haiti was designed to remove a corrupt and oppressive regime causing grievous suffering.
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