The book you are looking for is titled Psihologija gluposti (Psychology of Stupidity), edited by the French psychologist Jean-François Marmion
The book serves as a warning against what might be called a "stupidocracy." Druon warns that when a society rewards the appearance of competence over actual substance, it cultivates a culture of stupidity. Psihologija Gluposti Pdf
In many PDF versions of these texts, authors analyze the cost of stupidity. Italian economic historian Carlo Cipolla is frequently cited for his essay The Basic Laws of Human Stupidity . He categorizes people into four quadrants: The book you are looking for is titled