The Lost Generation
The Lost Generation was a particular age group in a time period during the 1920s. This age group was during World War 1. There was many authors and writers during this Generation.
Gertrude Stein & Ernest Hemingway
This term "Lost Generation" was produced by Gertrude Stein. Then the term was popularized by Ernest Hemingway in his books. Gertrude Stein was Ernest Hemingway's mentor.