Final answer:
The Deep South seceded from the Union sooner due to intense slavery-related concerns, economic reliance on slave labor for agriculture, and the ideology of white supremacy.
Step-by-step explanation:
The states of the Deep South seceded from the Union sooner than those of the Upper South and the border states primarily due to slavery-related concerns. The Deep South had a greater economic reliance on slavery, as their economy was heavily dependent on agriculture, with crops such as cotton, rice, and tobacco relying on the labor of enslaved people. In contrast, the Upper South and border states had more diverse economies with less dependence on slavery. Furthermore, the Deep South harbored stronger pro-secession sentiment, which was fueled by the belief that Abraham Lincoln's presidency would threaten the institution of slavery and their way of life. The secession of these states was not simply an act of preserving their cultural or economic way of life but was also deeply rooted in the ideology of white supremacy, which deemed all whites superior to Blacks, regardless of their economic status.