What are the Benfits of wars?
any example?

If you have to say war bring peace, how will you explain to people?

In no particular order, and not applicable to every war:

1. They allow people to be liberated. (And I am not claiming that all wars of liberation necessarily achieve their aim, even when the victors claim they have. Could I be thinking of anything in particular? Surely not!)
2. They prevent people from being enslaved. (You might have several defnitions of enslaved. Use them all.)
3. They promote the development of technology, some of which is appicable beyond the military sphere. (The introduction of the Comet and the 707 in the 50's revolutionised travel and business. They would have come along much later but for the developments in aircraft technology promoted by WWII)
4. They reduce population numbers, which can't be a strategically bad thing. (But then the soldiers and sailors come home and there is a baby boom. Ah well.)
5. They provide documentary material for the History Channel, which would otherwise be able to broadcast for only three hours per week.
6. They provide employment for anti-social misfits who are able to secure posts as psychologists investigating the causes and trauma of warfare.
6. If I were an arms manufacturer I should think them a jolly good thing.

8. They are in one sense a form of evolution - the most able group will win, and occasionally will wipe out the losing culture eg. Carthage.
9. Wars can cause a unification within a nation, or group of nations eg. Britain in WWII, Europe during the Crusades.
Further to Ophiolite's points:
1. Counter-example: India. The Indian people rebelled several times under British rule unsuccessfully, until they rebelled peacefully.
3. Further examples are rocketry and the Internet. However, there is the side effect of censorship of science which has military applications.

I think that this question really dippends on what were the goals of the specific war by the one who started it . After the war even if you won it sometimes on the pages of history you are the looser .

i was watching a war movie in which the brits were trying to get a dutch scientist to work for them not the germans, to which the scientist replied, "i am not in this to help any one side but i am looking for the largest budget available to further my scientific interests"

I totally disagree with war, but being non-biased I try to see that evidence in what could be benificial.

- population control
- less dominate males
- less pollutions in turn being created because of the 2 above
- less product consumption, more for people who are struggling for food
- stablilities in restoring environmental systems

--- but besides the fact that it could be benificial, I dont, because if we had more people growing our own food, we could in turn have more "environmental soldiers".
By this I mean restoring the fragile ecosystems that we are devouring, replacing flora and forest to develop adequate oxygenation of the atmosphere for the future of both plant life and humans.