Are you looking for a confirmation that this is true? Yes, it is. It passed in the Hose but was rejected by the senate, but if successful, it would forever ban slavery in the Mexican cession.
Numerous minority groups were seen as such by those in power who were usually leaning towards the right of the political spectrum. During the slavery era this was considered to be true of African-Americans. Women were also traditionally considered to be hysterical or similar which resulted in them not having all rights like men.
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Ya I'm agree with that they need more inputs of manufacturing in industry .
The system of mass reproduction in manufacturing developed during the Gilded age. Hope this helped you.
I believe the answer is: conflict perspective
Conflict perspective see society as something that always experiencing constant conflict between group of people in order to obtain limited resource. In this perspective, the group that 'won' the conflict would control the resource and would held the position in the highest place of that society's hierarchy and could determine the fate of other group.