Board Thread:Speculation House/@comment-3257939-20151009080148/@comment-25555436-20151011033310

Another reason, equally rational, is worldwide economics. Many nations, especially the big nations like the US, have a great deal of their economy depend on other nations, on trading with them, importing resources and exporting others. This means that if X destroys Y, X's economy plummets.

It's the reason China and USA don't just shoot each other. They despise each other a lot, but their economies depend on the other one. If one falls, the other one suffers as well.