Drett scott was considered property and the court can not take away property.
The imperialists needed workers to work on the land that was colonized. The locals were not an option because they were often either insubordinate, or they were protected by the law. That's why having slaves to work in those colonies was great, which is why they got them from Africa.
This question can have many answers but ill try to answer it in the north slaves werent profitable so most northerners didnt have slaves and eventually slavery was seen as morally wrong in the north so in the south once abraham lincoln became president the south became its own coutry and the civil war began so after the north won slavery was abolished in the south.
They enforced stronger laws against blacks
It provided affordable electricity for isolated rural areas. What problems did students and other young people face? They were unemployed (didn't have jobs), they were poor (poverty), they felt hopeless and had loss of dignity (did not respect themselves) and didn't have spending $$.