This is one of Heather Cox Richardson's best:
https://heathercoxrichardson.substack.com/p/december-29-2023
She has written about these ideas at length in two of her books, To Make Men Free and How the South Won the Civil War.
I discovered her books while I was writing the Making of America series. When I got to volume 5, FDR, I realized I needed a deeper understanding of how the parties evolved. That was when I found To Make Men Free (a history of the Republican Party.)
December 29, 2023
When asked at a town hall on Wednesday to identify the cause of the United States Civil War, presidential candidate and former governor of South Carolina Nikki Haley answered that the cause “was basically how government was going to run, the freedoms, and what people could and couldn’t do…. I think it always comes down to the role of government and what the rights of the people are…. And I will always stand by the fact that, I think, government was intended to secure the rights and freedoms of the people.”