 Materials continued to be separated by subject and would then be further divided by more specific heading, still listed and stored within these sub headings alphabetically.In World War II, American librarians and archivists played a major role in collecting Published in manuscript information about Nazi Germany, and also rescuing stolen books and documents the Nazis stole from target countries and from Jews.Archibald MacLeish, the Librarian of Congress, announced that fellow librarians "must become active and not passive agents of the democratic process."