"A youthful critic in his twenties, Randolph Bourne wrote a bitter essay in the intellectual magazine Seven Arts, lambasting his fellow intellectuals for lining up so readily behind the war effort. "
"One of the hit songs of 1915, “I Didn’t Raise My Boy to Be a Soldier,” by lyricist Alfred Bryan and composer Al Piantadosi, captured widespread American skepticism about joining in the European war. "
Suggested terms to look for include - diary, diaries, letters, papers, documents, documentary or correspondence.
Combine these these terms with the event or person you are researching. (example: civil war diary)
Also search by subject for specific people and events, then scan the titles for those keywords or others such as memoirs, autobiography, report, or personal narratives.