In 1895 a French doctor, Gustave Le Bon, published a book about how crowds move. Mussolini kept it on his bedside table. Hitler put it to work. Lenin annotated it in the margins. Thirty years later, in New York, Sigmund Freud's nephew applied those same ideas to advertising: he persuaded millions of American women to smoke, millions of American men to eat bacon for breakfast, and the United States government to overthrow the government of Guatemala. His name was Edward Bernays, and his manual is still in use. Advertisers use it. Political parties use it. Social platforms use it. The algorithms in your phone use it.

Influencing the Masses reconstructs that manual from the first page to the last. Twelve chapters running from Le Bon to Bernays, from Walter Lippmann to Carl Jung, from the five filters of Chomsky and Herman to surveillance capitalism. Real names, sources you can check, no conspiracy theories: only the documentation of techniques that have been around for more than a century and that circulate today in the ads you see, the talk shows you watch, the posts you share.

The last part of the book is practical. Ten recurring patterns to recognize at a glance. Five filters that decide what becomes news. The signals that expose a manipulator in a conversation. The daily habits that protect your attention, your sleep, and your vote.

A book for anyone who wants to understand why they bought what they bought, voted for who they voted for, feared what they feared. And for anyone tired of agreeing out of inertia.