This is as much of a FAIL™ in international relations as it is in economics.
Thanks for playing, anyway. The peak-to-trough part of the business cycle is an outlier. Carnot would have died laughing.
I'm sure Hitler thought he was a great patriot, who was totally dedicated to maximising Germany's glory. Unfortunately, being a psychopath, he destroyed his Germany and himself instead.
So can we please stop pretending that 'maximising self interest' actually means anything non-crazy?
The kindest thing you can say about it is that it's inherently pro-cyclical. The mood swings when reality catches up with it don't seem to be fun.