Maverick: As per Clausowitz (sp sorry) War is an extension of political power.
As per John Keegan, Clausewitz was absolutely wrong in that and following that doctrine condtributed significantly to the disasters of 20th century - by causing belligerents to rely on massive drafted armies rather than professional ones, etc.
War is an extension of culture and at the same time it is a unique subculture - having it's own life, etc.
That culture persists and lives on it's own even if the original political goals of war are proven unreacheable.
In WWI all countries expected quick bloodless resolution. When it was absolutely certain that such resolution is not possible and a stalemate is unbreakable (1914-1917, till US intervention) while millions of lives are wasted with no discernible result, did politics said "OK, war is not working, set's stop it?". Absolutely not. War was developing with no influence or regard for politics - causing internal distruction of Austria, Russia and Germany way before any conclusive military defeat.
If war is an extension of politics, how could it be suicidal?
Of course anyone familiar with military - any military - knows that it is a very distinct culture with different values than "mainstream society". They are not tools that can be taken out, used and put back without affecting the nature of society itself.
miko