Divine right should be the answer
Answer:
In his inaugural address, Lincoln promised not to interfere with the institution of slavery where it existed, and pledged to suspend the activities of the federal government temporarily in areas of hostility. However, he also took a firm stance against secession and the seizure of federal property.
Exceptionally high population densities occur in the Yangtze delta, the Pearl River Delta, and on the Chengdu Plain of the western Sichuan Basin. Most of the high-density areas are coterminous with the alluvial plains on which intensive agriculture is centred.
When Lincoln died, the nation was thrown into trying to rebuild from the civil war, multiple slavery sympathizers got government positions so they introduced new stuff that was like slavery but not directly linked to it. Some of those systems still stand today, it’s sad. GOD BLESS AMERICA