Final answer:
The Dred Scott decision changed North-South relations and current social and political tensions in America are diverse and complex.
Step-by-step explanation:
The Dred Scott decision by the U.S. Supreme Court had a significant impact on the relations between the North and South. The decision, which declared that African Americans could never be citizens and that Congress could not interfere with the expansion of slavery into the territories, enraged Republicans. The decision undermined the Republican party's central platform, leading to further divisions between the North and South on the issue of slavery.
The current social and political tensions in America are diverse and complex. Some of the key tensions include racial inequality, political polarization, socioeconomic disparities, immigration, gun control, and climate change. These issues have led to heightened divisions among various groups and have been the subject of intense debates and protests.