The Oregon trail
Reason: Gold
It was in the 1960's that the civil liberty was most seriously threatened where the social movements such as 1960 Civil Rights Movement were pushing for their rights and to put an end to discrimination particularly to the African-Americans in the country.
Explanation:
human resources development is important because it is a investment in ones employees that will ultimately result in a stronger and more effective workforce when a organisation develops their employees they are strengthening their assets and making employees more valuable
The break down of traditional boundaries in the face of increasingly global financial and cultural trends.
This gave america more culture such as jazz in the south and more people came to america which mean't more jobs, which mean't more currency for america. Hope i helped!