Slavery in the Nineteenth Century

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Student Question

Why was the Wilmot Proviso perceived as a threat by the South?

Quick answer:

The Wilmot Proviso was perceived as a threat by the South because it aimed to restrict slavery to existing areas, preventing the expansion of slave states into territories acquired from the Mexican Cession. This would have led to a permanent minority status for slave states in the Union, as the number of free states would increase, allowing them to dominate politically. The South feared this imbalance would undermine their political power and influence.

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The South perceived the Wilmot Proviso in this way because it would have confined slavery to the places where it already existed.  This would have doomed the slave states to permanent minority status in the growing Union.

If the Wilmot Proviso had passed, the number of states with slavery would have remained constant.  No new slave states could have been carved out of the eventual Mexican Cession.  As the country grew, this would mean that free states would come to outnumber slave states by a wide margin.  This would have allowed the free states to dominate the slave states.  Therefore, the proviso seemed dangerous to the South.

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