Do you have a tutorial on this?
The united states had ties to many other economies in the world, when the U.S economy collapses in 1929, the world is sent into the depression, which Hitler used to his advantage, thus causing the raise of Fascism in the 30's thus resulting in WW2. Unemployment rates skyrocketed when the unemployment occured, banks failed, etc.
There was no way to contain the diseases no vaccines poor treatment no knowledge of what it was not a strong immune system
It provided greater political freedom to women