Charles Mackay (1814–1889) was a Scottish poet, journalist, author, and anthologist, known for his enduring work, 'Extraordinary Popular Delusions and the Madness of Crowds,' first published in 1841. Mackay's extensive writings on human folly, social psychology, and crowd behavior have cemented his legacy as a pioneer in the field of crowd psychology. His work has often been referenced in discussions about mass hysteria, economic bubbles, and collective behavior. Although 'WHAT IS MOB MENTALITY? - 8 Essential Books on Crowd Psychology' is not directly attributed to Mackay, his foundational analysis and insights into crowd psychology underpin much of the modern understanding of the subject. His literary style is marked by meticulous research, engaging narrative, and a didactic approach aimed at enlightening the reader about the quirks and foibles of societal behavior. As a figure of his time, Mackay's work is reflective of the Victorian fascination with progress and science, simultaneously cautioning against the irrational nature of humans when they come together in large numbers. The relevancy of Mackay's observations has transcended the era in which he wrote, influencing economists, psychologists, and sociologists who study the impact of collective thought on individual decision-making and societal trends.