In existographies, Jacques Naigeon (217-145 BE) (1738-1810 ACM) (FA:96) (CR:5) (LH:4) (TL:9) was a French philosopher, editor, and artist, characterized "Diderot's monkey" (Harpe, c.1790), “monk of atheism” (Flynn, 2007), and or “brash evangelical atheist” (Hecht, 2003), in respect to the Holbach salon, noted for 
In c.1755, Naigeon started out as sculptor and painting apprentice under artists Lemoyne and Vanloo.
Holbach's reviewer | Copyist
In c.1760, Naigeon joined the so-called “school of Diderot” and the coterie of Holbach salon, finding a taste for literature and philosophy awaken in him, becoming Diderot’s disciple, supposedly.
Naigeon’s main job was to review Holbach’s manuscripts and to “increase the dose of atheism”, when he does not find it sufficient, then to have them copied and printed. The method by which Holbach’s works were published, was that each manuscript was first re-copied, so that Holbach could retain the original. The copyist was Naigeon’s brother, whose overt job was working as a food controller at Sedan, France, according to which part of his job required him to come to Paris each year, spend six months there, whereat he transcribed Holbach’s manuscripts, then leave and have the copied manuscripts printed by the publisher abroad.
In 1792, Naigeon, in the Methodical Encyclopedia, preached fatalism, materialism, and atheism, and penned articles devoted to the atheists: Anthony Collins, Tommaso Campanella, Lucilio Vanini, and Meslier.
In his work, Naigeon was published Diderot's "Philosophical Principles on Matter and Motion" for the first time.
In 1794, Naigeon, in his Philosophy: Ancient and Modern (Philosophie Ancienne et Modern), outlined views in agreement with that of Holbach, albeit with emphasis on the "life sciences" as against the physical sciences.
Quotes | On
The following are quotes on Naigeon:
- “Naigeon is Diderot’s monkey, whose conversation he constantly repeats, as he copies his tone and his manners. He adds to the seriousness of a scholar the hairstyle of a petty-master, and the precautions of ill-health with the appearance of strength.”
- — Jean Harpe (c.1790), Publication
Quotes | By
The following are quotes:
- “The idea of god is nonsense and the barrier to all human progress.”
- Jacques-Andre Naigeon (French → English) – Wikipedia.
- Flynn, Tom. (2007). The New Encyclopedia of Unbelief (pg. 277). Prometheus.
- Hecht, Jennifer. (2003). Doubt, A History: The Great Doubters and Their Legacy of Innovation from Socrates and Jesus to Thomas Jefferson and Emily Dickinson (pg. 553). HarperOne.
- Naigeon, Jacques. (c.1800). Historical and Philosophical Memoirs on the Life and Works of Denis Diderot (Mémoires: historiques et philosophiques sur la vie et les ouvrages de D. Diderot). Publisher, 1821.
- Warman, Caroline. (2020). The Atheist’s Bible: Diderot’s Elements of Physiology. Open.