Answer: when a writer points to a problem caused by social customs without explicitly challenging those customs.
A social commentary is the use of rhetorical devices in order to comment on the problems of society. This is usually a critique, and it is intended to promote change or to appeal to people's sense of justice. However, when this commentary is done subconsciously, the writer points towards the problem but does not explicitly challenge the customs.
Edgar Allan Poe uses unique diction to create a melancholic mood in his story. By using words like “fearing” and “dark,” he creates an aesthetic that’s fitting to the Romantic era. The use of imagery plays an important role in all of poe’s tales. His vivid descriptions creates an image of the story in the reader’s head.
Since Gatsy first met Daisy, five years have passed because he has been away at war and then involved in business to make the money he believes he needs to win Daisy's love. Not until he is rich does he arrive at West Egg. In the meantime Daisy has married Tom Buchanan and had a daughter, Pammie. Gatsby also threw huge parties hoping that Daisy would one day stumble across the party. He even bought a house across from hers.