[@Emma]
I love this idea!
If I get my creative juices back up and flowing, I'll probably join.

However, I would like to point something out-
A total of 21 million people can be saved on these 7 space stations.
You said 80 million people were being left behind to die.
Current global population is over 7 billion- we reached the mark at 2011/2012, and that was 4 or 5 years ago. What happened to the billions of other people? A World War 5 might be devastating, but not enough to decimate 80% or 90% of the population- that's genocide, not war. War isn't that destructive.