The northerners didn't need slavery because their main economy is manufacturing at factories.
Because they didn't have anything to do with slavery, they viewed it with a critical eye.
The southerners had slavery because they had giant plantations to farm cash crops. The soil was futile and had a suitable climate.
The first and third I believe I'm not sure though
Answer:
The objective for the Dawes Act was to assimilate Native Americans into mainstream US society (White homesteaders) by annihilating their cultural and social tradition. A result of this would be that over 90 million acres of tribal land was stripped from Native Americans and sold to Homesteaders.
I hope this is what you meant :)
