Clastic Sedimentary Rocks.
During the 1800s, nativists promoted the idea that immigrants contributed to unemployment by competing for jobs that they believed should go to people born in America..
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There were many reasons. The country was in extreme poverty, there was starvation everywhere and people were dying in misery. They wanted to change the imperialistic rule and impose their own bolshevik rule. People also wanted to end their participation in the war which is one of the first things that happened after the revolution. The communists left the war before the war ended.