The factors were mostly geographical. They had Nile to help them make food and have surpluses for trading and they were also protected from intrusions on all sides. One side had the desert, one had Nile, and one had the Sea, and nobody could just easily attack and destroy them.
If the change is the Industrial Revolution:
transcontinental railroad: helped to transport goods and get across the country
US army: helped to protect the US and make sure no one is going to break the new amendments
Discovery of resources in western land: Allowed the US to be able to expand and people would be able to live, could also give the US more money
In general, the Supreme Court during the era of Progressive reform in the United States tended to side with the big businesss, in the sense that there just wasn't enough legislation to make what they were doing blatantly illegal.
Both of them were severely hurt by nuclear radiation
Hiroshima is one of the japanese cities that was bombed by the USA with atomic bomb during ww2.
<span>Chernobyl also experience a nuclear disaster in 1986,in the USSR.
</span>