So if you need a one‑sentence takeaway: John Locke’s 1689 philosophical work, at ~360,000 words, is the longest single work still universally titled an “essay” by its author and literary history.
: The longest essay ever attempted as a single sitting writing stunt is another matter. In 2021, a performance artist in Berlin typed for 120 hours straight, producing a 540,000-word stream-of-consciousness “essay” on loneliness. It was never published or verified. worlds longest essay
If you want the : a French philosopher, Bernard-Henri Lévy , once wrote a 1,200-page essay on philosophy and war ( L’Esprit du judaïsme ), but again, publishers call it a book. So if you need a one‑sentence takeaway: John
If you expand the definition to include , the record changes. The longest published “essay” in the traditional sense is often cited as The Story of Civilization by Will and Ariel Durant (11 volumes, ~2 million words). But that’s really a book series. It was never published or verified