Evaluate the reasons that slavery expanded in the United States after

Evaluate the reasons that slavery expanded in the United States after 1820. What were the major factors accounting for the expansion of the slave population after 1820?

What were some of the southern defenses of the institution? What caused the growing northern opposition to slavery? Why was there a growing inability for either side to compromise on the issue of slavery?

ANSWER
Answer: An ideal answer will:
1. Examine the factors, such as cotton prices, slave treatment, and slave population growth, that accounted for the growth of southern slavery.
2. Assess the treatment of slaves on plantations and the reasons behind the change after 1820.
3. Analyze southern arguments in favor of slavery.
4. Examine the growing northern chorus calling for the abolition of slavery.
5. Assess why both sides were growing incompatible after 1820.
6. Provide a concise and effective conclusion.