the fact that the us had a powerful economy
The kidnapping of US sailors (pressing into British service) on the high seas was the major factor.
The transportation revolution consisting of canals, railroads and many other ways to get across the globe contributed to the influx of immigrants.
POSSIBLY the strained relations between the Soviet Union and the US.
Immigrants coming in to the us and bringing the cultures with them
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Some economic factors that contributed to slavery include, profits, the intensity of the labor and demand for cotton. These factors made farmers not want to do the work themselves.
the fact that the us had a powerful economy
Has it? Or would Tobacco Control have us believe it has?
The kidnapping of US sailors (pressing into British service) on the high seas was the major factor.
they have contributed by helping the US grow
increased migration, higher birth rates among minority groups, and interracial marriages. These factors have contributed to a more diverse population in the US.
You mean long term contributed factors of Americas becoming a superpower. Google military-industrial complex. but also as an American its pretty obvious that simply freedom has made us a superpower.
No. Gay people have a few different options for children, including adoption, surrogacy, and artificial insemination. As of 2014, 20% of gay couples in the US have children.
Prescription and OTC medications, better healthcare (even though some may not have access to it), welfare and government assistance programs, etc.
The transportation revolution consisting of canals, railroads and many other ways to get across the globe contributed to the influx of immigrants.
POSSIBLY the strained relations between the Soviet Union and the US.