Why might a writer sometimes return to an earlier writing stage?

Whenever a writer finds themself in a well-developed stage of their writing, it is usual to be unable to continue the story due to a lack of inspiration for further plot. This is commonly known as writer's block.

In order to address this issue, a writer might take a peek into an earlier stage of their writing to check on the main idea they once began developing, as well as the patterns in tone and vocabulary. Eventually the writer will come up with a new idea to complement where they last left off.

eli whitney was an american inventor best known for inventing the cotton gin. this was one of the key inventions of the industrial revolution and shaped the economy of the antebellum south.