See also: Peace
War used to be defined as an armed conflict between two or more nations. It has since become recognized as the use of violence by any organized group against another (see "The Transformation of War, by Martin Van Creveld). It is also used colloquially as an unarmed conflict which may or may not include lots of lovely violence. Pacifists are against war and all for peace, but they easily forget that without war there cannot be peace. On the other hand, there can be peace without war.
War and the Economy
War often stimulates the economy. Especially the textile industry and the dry cleaning sector do good business due to the proliferation of soiled pants on the battlefield. See spuriousmonkey.
Reason for War
My nation wants what your nation has.
My nation is superior to yours.
I think you are a threat to me.
My nation needs to spread its ideology
I want to further my political goals and use a scapegoat or diversion to get a nation behind the idea of war, or lead them slowly into war.
I can make lots of money from it.
Killing is damn good fun.
Piles of burning corpses smell great in the morning.
You have weapons, might as well use them.
Reasons against War
None, you fucking pussies.
You can lose, but you can blame that on the anti-war crowd.
You're more likey to die from friendly fire than enemy fire. And who wants to go out like that?
"War, war is stupid and people are stupid and I hear the banging of hearts and fingers... war." - Boy George
"It'll be a great day when education gets all the money it wants and the Air Force has to hold a bake sale to buy bombers." Author unknown
"On the other hand fellas, what if war were declared, and everyone showed up?" Gary Larson
the idea in war is not to die for your country but to make the other poor dumb bastard die for his - patton.
"War! What is it good for? Absolutely nothing!"
"A war every day keeps erection problems away".
“War is God's way of teaching Americans geography.” --Ambrose Bierce