Cipolla's most popular work is a collection of two tongue-in-cheek essays on economics, first published in 1988 with the title "Allegro (ma;-) non troppo" ("Happy but not by too much" or, as in music, "Quickly, but not too quick").
The first essay, "The Fundamental Laws of Human Stupidity", explores the controversial subject of stupidity. Stupid people are seen as a group, more powerful by far than major organizations such as the Mafia and the industrial complex, which without regulations, leaders or manifesto nonetheless manages to operate to great effect and with incredible coordination.