what was edgar allen poes major acomplishments

Some of Edgar Allan Poe's major accomplishments include:

1. Pioneering the detective fiction genre with his short stories featuring the detective C. Auguste Dupin, which laid the groundwork for future mystery writers like Arthur Conan Doyle (creator of Sherlock Holmes).

2. Revolutionizing the genre of horror fiction with his macabre and suspenseful tales, such as "The Tell-Tale Heart," "The Pit and the Pendulum," and "The Fall of the House of Usher."

3. Contributing to the development of science fiction with works like "The Unparalleled Adventure of One Hans Pfaall" and "MS. Found in a Bottle."

4. Influencing the development of the modern short story format with his precise and economical writing style, which helped shape the works of later authors like Ernest Hemingway and Raymond Carver.

5. Establishing himself as a leading literary critic and editor, whose reviews and essays helped raise the standards of American literature during his time.