The declaration of independence
Explanation:
Because history gives us the tools to analyze and explain problems in the past, it positions us to see patterns that might otherwise be invisible in the present – thus providing a crucial perspective for understanding (and solving!) current and future problems.
Answer:
Southerners approved the Dred Scott decision believing Congress had no right to prohibit slavery in the territories. Later, in 1868, the Fourteenth Amendment overturned the Dred Scott decision by granting citizenship to all those born in the United States, regardless of color.