Why does slavery thrive in the South but wither away in the North by 1810?

Suggested reading:

• > Interlude 2. The American Landscape in 1790
• > Chapter 10.  The Plight Of Those Enslaved
• > Chapter 15. Hamilton’s Capitalism Sets The Economy In Motion 
• > Chapter 90. The South’s First Cash Crops
• > Chapter 82. The South’s Second Cash Crop – Breeding And Selling Slaves

Caution: some of this content may be too advanced and disturbing for young readers.