Why did people think slavery was dying in 1790?

In the early 1790s, slavery appeared to be a dying institution. Slave imports into the New World were declining and slave prices were falling because the crops grown by slaves--tobacco, rice, and indigo--did not generate enough income to pay for their upkeep.

The Northern states abolished slavery. The Southern states had too much money invested in slaves already to go that far.

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the answer is d. party organizers, volunteers, voters and elected officials.

a stronger central government  

its what they are