<span>Romanticism im pretty sure
</span>
There were several features that helped industries grow quickly in the country after the Civil War. There was massive influx of immigrants and so there was no dearth of labor force. Also there was great improvement regarding new inventions and technological advancements. There was also great availability of raw materials like timber, oil etc.
19th amendment to the U.S Constitution (1920) extended the right to vote woman in federal or state elections
It was too profitable not to expand and to cater to the growing population.
Explanation:
USA's white population grew incessantly during the <u>Westward expansion as it was a state sponsored policy to move to the west and displace the indigenous people from their wild but fertile lands.</u> It was simply too profitable for the US to use the land which to them was till now untapped.
<u>There was also no real concern for the life of the native Americans due to the racism prevalent in white America.</u> None of the administrators was really concerned with conservation of their culture.
