I would say that the Irish immigrants and the various other European immigrants coming to the nation dirt poor and not able to power the US economy was a large factor. Along with the banks not usually accepting them, and all of this along with the hyperinflation of the German currency.
The answer to 4 is “the Kansas Nebraska act”
<span>There were 49 infantry divisions that were destabilized and experienced repeated episodes of mutiny in the French Army. For the Russian Army, a rebellion of the crew against their oppressive officers in June 1905 later came to be viewed as an initial step towards the Russian Revolution of 1917.</span>
