There aren't too many reasons to support war in fact I'm also 100% against the idea of war in the majority of cases. WW1 & WW2 were probably justified and needed to happen. However, others may argue there are benefits of war; For example, if we look at WW1 and the technological advancements excluding weapons which were made because of the war:
- Mobile X-ray machine
Before the war wounded soldiers were often removed from the battlefield and transported back home to get evaluated or medics diagnosed incorrectly on site resulting in soldiers being mistreated. The mobile X-ray machine allowed medics to identify breaks and the like on site and be able to offer medical care based on the results. These are now used around the world in different clinics. For example, if you are bedridden in a hospital then nurses will now come to you and perform a X-ray.
- Satellite communication
You might recall hearing about messages being delivered via pigeon, telegrams (which were invented in the American civil war or radios which were not very reliable and could be tapped into very easily by simply being on the same channel. Radios also had a certain distance in which they wouldn't be able to transmit to each other.
Of course satellites are used for all sorts of things now including being used by everest base camp to get medical care to climbers who are suffering with Cerebral hypoxia and getting them helicopter evacuation down to lower levels. Without the invention of satellite communication expeditions such as Everest, K2 and the like would be much more risky than it is today.
- Hydrophones
Primarily used to locate U-boats these devices were designed to be used underwater to listen for sounds underneath the surface. These are now being used for various different things including locating submarines below the surface and surveying the oceans. For example, these devices are used to monitor whales within the ocean.
-Penicillin
Probably one of the most breakthrough discoveries at the time which has been deemed a super drug and saved many peoples lives. Imagine a world without penicillin. Infections which penicillin now treats these days were originally fatal. Penicillin was originally discovered in 1869 but, if it wasn't for WW2 then the effectiveness of the antibacterial drug in the world. Yeah we have alternatives for people who are allergic to Penicillin but, at the time this substance saved several thousands of soldiers dying from infection as well as those who had infections in hospitals, care homes and at home.
This isn't even including the advancements made to airplanes (jet engine), air control communication, Nuclear power, Enigma computer and ultra sound. Plus the improvements made to engines used in land vehicles.
Beyond what has already been discussed the only real benefit I can see from war is the technological advancements which are made. Especially within the medical field. You could also look at the cold war between America and Russia and probably argue that we wouldn't have landed on the moon (as soon as we did) and build a space shuttle capable of doing that if it wasn't for the massive dick measuring competition these two countries were having.
Is it a equal trade? Killing thousands of people for advancing medical care such as Penicillin which has saved thousands? It depends on the mentality that you have. Whether saving the majority is better than a select few. It's the typical dilemma where you are given a decision to make on which rail would pick the with three people tied to or one person. There's probably not a perfect answer to this, and war probably isn't justified ever. But, we shouldn't ignore the benefits which do come from war whether it's justified or not.
The main reasons for goverments to support war is financial and territorial resources. These resources are needed for power and domination over other countries. There's no some higher purpose to start war. Only human vices motivate people to initiate such act of violence. Unfortunately it's sad truth about human nature.
Yes, but this isn't a reason to support war. In fact you might argue that this is a reason to not support war as it encourages greed and dominance. For example, if you asked people about monopolies in the business world people would more than likely say they are bad and small businesses should be given a chance to compete. Well, if the USA declared war on a smaller country to gains it's power, profits and strategical position is that really a good thing?
This is why World War happened. A coalition was formed against German forces and their allies to prevent them from gaining superior control. Of course, there was other things like eradicating a race etc. This is why I feel that in this particular situation war was justified. It was preventing another country from eradicating a race, and taking out several countries.
Can you explain what's the reason? You can say positive as well as negative reasons.
I think the most common reason for war is the urge to capture resources owned by another jurisdiction. For example, the USA frequently goes to war to secure access to energy resources.
War can be caused by invasion and war could mean death and destruction of properties. This can be a reason for people to support war. The preservation of lives and to defend your properties.
You are probably right from the defendants view. Although, flip that around and try to support the country which is attacking for what is probably for political gain, or power. There's two sides and it's people shouldn't support their country declaring war just for power, greed or what ever.