I'll tell you. First off, if it wasn't for war we wouldn't have war movies. Think about it, guys like Schwartzenneger, Stallone, Wayne, and Reagan would never have had a chance.
Second off, it's the only way to obtain prime real estate for guys like McDonalds, Best Buy, and Texaco. The owners of that land aren't just going to GIVE it to us.
Third off, it preserves freedom. Since the early 1970's no one has observed and kept a close eye on American citizens than our virtual alphabet-soup of police organizations, which grows by the day. Perhaps if they were watching something other than us you and I would be able to visit the observation deck of the World Trade Center today?
Fourth, it's a cool way to experiment with the neat things we've come up with in our secret labs. And it's also a good way to get such great scientists like Shiro Ishiiand Reinhard Gehlento work in our "best interests".
So the next time you hear some crybaby saying "no" to war, you point these things out and set them straight. If that doesn't work then kick the shit out of them.