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.
For a single, continuous, non-fiction prose argument by one author, the record may go to by Richard Rhodes (c. 350,000 words) or The Gulag Archipelago by Aleksandr Solzhenitsyn (c. 500,000 words across three volumes). However, Solzhenitsyn called it a “literary investigation,” not an essay. worlds longest essay
: There is no universally accepted “longest essay” because once an essay exceeds ~50,000 words, publishers rebrand it as a book. The longest famous essay likely remains John Locke’s An Essay Concerning Human Understanding (1689) — 360,000 words, spanning four books. Locke called it one essay, and by that definition, he probably holds the crown. So if you need a one‑sentence takeaway: John
: 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. 500,000 words across three volumes)
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.
The does not officially list “longest essay,” but in academic circles, the longest known undergraduate essay is one by a University of Bristol history student in 2012 who submitted a 112,000-word dissertation (roughly the length of a 350-page book). The tutor reportedly read it over a summer.