Absolutely nothing!!

This isn't strictly true as war is very good for arms manufacturers and the international arms trade

And the car industry. Plus Harley-Davidson wouldn't be around today if the US and British Army hadn't bought so many motorbikes off them in WW2. They were about to go bust but the wartime '45' Model is their all-time best-seller.

Huur-Yeahhh! Say It Again - WAR!!