Final answer:
The Civil War created sectionalism due to its impact on politics, economy, and society in the North and the South.
Step-by-step explanation:
The Civil War created sectionalism for many years to come due to its impact on various aspects of American life.
Historically, the war exposed political, economic, and social fissures in both the North and the South, which continued to play out during Reconstruction and beyond. Politically, the war resulted in the federal government gaining dominance over the states. Economically, the war weakened the South's plantation economy and strengthened the North's industrial economy. Socially, the war created tensions between different social classes, leading to riots and eventually resulting in the emancipation of enslaved blacks.