QUOTE(Alone @ Apr 6 2010, 09:53 PM)
war improves science and technology, as each country tries to outdo each other by creating better stuff. Radios, were originated from the telecommunication devices for the army. Human biology, medicines and stuff related were experimented using prisoners of war to boost knowledge.
Everyone here gained something from the cruelty of the previous warring generation.
This is a misconception. Do you think that we would not have radios now if there were no wars. Absolutely no.
Wars might seem to accelerate technological advancement. But that is only a short term growth. Wars also destroy science and technological discoveries. Germans had advanced rocket technologies in the 40s. They were destroyed with them. Humans took 1 or 2 decades to re-develop it. Think what would have happened if US and Soviets had a nuclear war. We would have pushed back centuries on technological advancements. Fortunately the cold war is over.
We do have technological advances in peace time. Might look slower in short term, but sustained. Look at the enormous technological advances we had in the last decade in various disciplines. They were not at all motivated by any military needs. Peace time technological innovations are shared between nations (unlike in war time where they hide the discoveries) which further boost the advancement. International space station and use of Russian rockets by US and other countries are some well known examples, but there are numerous others.

Added on April 7, 2010, 11:36 amQUOTE(m1ck3y3mon @ Apr 6 2010, 10:24 PM)
should i conclude that war brings both pro and cons and nature does not jump?
or arrive other conclusions?
There are no pros from wars. If you want pros for the shake of argument you might want to consider the suggestion by
BillySteel. It might help reduce world population. But if you take it, you might end up saying even AIDS, malaria and road accidents as helping human race.
On serious note there is one pro that I could think of. Usually by end of the big wars, people realize how bad the wars are and formulate stuff like humanitarian law, etc. But is this really a pro? It is like saying the good thing about burning your hand is you learn that it is bad to burn your hand. hehe.
Are you working on a thesis or something?

Conclude wars are bad. I don't know what marks you would get. But you would have helped humanity a little by spreading peace.
This post has been edited by pheonix71: Apr 7 2010, 11:38 AM