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So with a POD of 1900 onwards, make the US south the worst shit hole you possibly can for everyone living there, make the standard of living like Hati if you can.

Bonus points

1) the North is doing just fine, but decides to let the south hang itself.

2) the damage is self inflicted

3) religion is involved

4) 10 or fewer cities south of the Mason Dixon line with populations greater than 250,000 (American South West doesn't count, but Texas is included)

5) astronomical teen pregnancy rate

6) high suicide rate
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