Which best describes many of the postwar era’s writers and their works?
fantastical
progressive
apathetic
pessimistic

Answer;
Progessive
The word that best describes many of the postwar era's writers and their works is progressive.

Explanation;
After the war many writers chose to focus on aesthetic or social rather than political problems, with an exception of some like C.P Snow.
Other novelist and playwrights of the 1950s, often called the angry young men, expressed a deep dissatisfaction with British society, combined with despair that anything could be done about it.