Basically, all of European and Asian economy was more or less ruined after the War while the United States were safe because their land was not destroyed. This was combined with the baby boom generation when suddenly a lot of young people began working and since the US was exporting like never before they needed factories and workplaces filled.
Because the Articles of Confederation where extremely weak forms of government and pretty much had to be scrapped before the constitution was written.
The largest flow of German immigration to America occurred between 1820 and World War I, during which time nearly six million Germans immigrated to the United States. From 1840 to 1880, they were the largest group of immigrants.
The laws developed so that people are not accused unjustly or without any reasonable suspicion. The people are also protected from unwarranted searches and seizures as well as from having things taken as evidence if the person is not accused of a crime or without a warrant.
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A. Tenant farmers owned all their equipment