Why would the "job" of being a leader change during war?

there is an expansion in abilities of the president during a wartime. the president gains many authorities that he would not have had prior. the president is commander in chief of the military first and foremost, and during a war, the focus of the president will likely shift off of other issues to focus on protection of the country.

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.