War Is a Racket (1935)
I have mixed feelings about this.  The problem is that if you are being attacked, you will gladly allow people to make big profit if they save lives.  You can try to fight the war without profit but you might not like the results.  Ultimately, wars are started by governments.  They cajole the resources of the nation to fight the enemy.  Each country has the things they are good at it and they will use those things to their advantage.  In the US we are a free market society and happily give out big rewards (aka profits) to those that can make a difference and build things that the nation wants.<p>So the reason I say I have mixed feelings is because I can imagine a world where the entities that make profit off of war can use their influence to prod the nation into war.  And this should be prevented.  I suspect this has happened in the past.