How and why did the civil war started?

The conflict began primarily as a result of the long-standing disagreement over the institution of slavery.

Explanation: it mostly started because of several disagreements between the north and south mostly over the concept of having slavery in the united states.

the answer is a) to be able to obey them.

the following best describes postwar era writers in their works:

many writers,authors,novelists,poets concentrated more on social art and social writing and stayed away from political writings.