Verified for the 2025 AP US History exam•Last Updated on June 18, 2024
As the United States expanded westward, profound differences between North and South intensified. These differences involved not only the institution of slavery but also immigration patterns, economic systems, and cultural values, creating deep sectional tensions that would eventually lead to civil war.
The mid-19th century brought waves of new immigrants to America's shores, dramatically changing the demographic makeup of Northern cities and widening the cultural divide between regions.
The rapid influx of immigrants, particularly Catholics from Ireland and Germany, sparked a powerful backlash among many native-born Americans who feared cultural, religious, and economic changes.
Nativism - belief that native-born Americans needed protection from immigrants
The American Party (Know-Nothing Party) emerged in response to immigration
Know-Nothings advocated:
Temperance movement gained support partly due to anti-immigrant sentiment
Anti-Catholic prejudice was especially strong, as many immigrants practiced Catholicism
In the newly acquired western territories, racial conflicts emerged as diverse populations competed for resources and opportunity, often resulting in discrimination against non-white residents.
North and South developed drastically different economic systems by the mid-19th century, creating conflicting interests and values that made political compromise increasingly difficult.
Northern economy increasingly based on:
Southern economy relied on:
The Free Soil Movement opposed slavery's expansion for economic reasons
Though initially a small minority, abolitionist activists grew increasingly vocal and influential in Northern society, using various tactics to fight against slavery and raise awareness about its horrors.
Though a minority in the North, abolitionists grew more vocal and influential
Key abolitionists and their contributions:
Abolitionist actions:
As Northern criticism of slavery intensified, Southerners developed increasingly elaborate arguments to defend the institution, seeing attacks on slavery as threats to their way of life, economy, and social order.
Southerners developed multiple arguments to defend slavery:
Southern response to criticism:
Books and publications on both sides of the slavery debate further polarized public opinion, with influential works shaping how Americans viewed the moral and political issues at stake.
Books and publications intensified the debate over slavery
Anti-slavery works:
Pro-slavery works:
Southern reaction to anti-slavery literature was intense:
The sectional differences between North and South created a widening cultural and ideological gap that made compromise increasingly difficult. By the 1850s, Americans in different regions were developing fundamentally different understandings of their nation's future, with contrasting visions of economic development, citizenship, and human freedom. These differences would eventually prove too great to resolve through normal political channels, setting the stage for the conflict to come.
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