Here's an enjoyable, brief article from the Merriam-Webster website, about Peter Mark Roget and the creation of his famous Thesaurus.
More than just a collection of related words—Peter Mark Roget intended his Thesaurus to be a classification of all knowledge
by Joshua Kendall
Though nearly everyone is familiar with the Roget’s Thesaurus, few people know anything about Peter Mark Roget, the eminent 19th century physician, physiology expert, mathematician, inventor, writer, editor and chess whiz—and what motivated him to write his immortal book.
Roget was obsessed with symmetry. The 1852 Thesaurus divvied 1,000 concepts into six Linnaean classifications.
We tend to think of a thesaurus as a collection of synonyms and antonyms. But Roget’s is essentially a reverse dictionary. With a dictionary, the user looks up a word to find its meaning. With Roget’s, the user start with an idea and then keeps flipping through the book until he finds the word that best expresses it. The organization of the book reflects the unique intelligence of the polymath that created it.
(adj.) wild and frenzied; from Greek κορυβαντες (Korybantes)