Human beings have always had a complicated relationship with truth.
Long before the invention of newspapers, television, or the internet, societies understood that perception could be shaped. Kings commissioned flattering histories. Empires carved victories into stone. Religious leaders used symbols and stories to inspire devotion. Politicians promised futures they could not guarantee.
The manipulation of belief is not a modern invention.
What changed in the twentieth century was something more profound: humans began to study persuasion scientifically.
For the first time, thinkers and practitioners attempted to understand not merely what people believed, but why they believed it. They explored the hidden impulses behind decisions, the emotional forces beneath rational arguments, and the psychological mechanisms that could move large groups of people.
Out of this emerged one of the most influential—and controversial—ideas of the modern age:
Perhaps people do not primarily make decisions through reason.
Perhaps they are guided by desires, fears, identities, and unconscious impulses that they themselves do not fully understand.
The person most associated with this revolution in thinking was Sigmund Freud.
And one of the people who recognized its commercial and political potential was his American nephew, Edward Bernays.
Together, though in very different ways, they helped transform the modern understanding of human behavior.
Freud and the Discovery of the Hidden Mind
At the beginning of the twentieth century, Western culture was built on a powerful assumption: that human beings were rational creatures who evaluated information and made deliberate choices.
Freud challenged that assumption.
Working as a neurologist and founder of psychoanalysis, Freud argued that beneath conscious thought existed a deeper psychological world shaped by instincts, childhood experiences, fears, desires, and unresolved conflicts.
The human mind, he suggested, was not a clear window through which people understood themselves. It was more like an iceberg, with much of its influence hidden beneath the surface.
Freud’s theories remain debated among psychologists today. Many of his specific ideas have been challenged, revised, or rejected by modern science. Yet his broader cultural influence was enormous.
He changed the way Western societies talked about human nature.
After Freud, people became more willing to consider that they might not fully understand their own motivations.
A person might believe they were making a logical choice while actually responding to insecurity, status, desire, or fear.
That insight would prove extraordinarily powerful.
Because if the unconscious mind influenced behavior, then perhaps behavior could be influenced by appealing directly to the unconscious.
Edward Bernays and the Engineering of Consent
Edward Bernays understood this possibility better than almost anyone of his generation.
Born in 1891, Bernays was not merely inspired by Freud—he was part of Freud’s extended family. His mother was Freud’s sister, making Bernays Freud’s nephew.
But Bernays did not become a psychoanalyst.
He became something arguably more influential in modern society: the father of public relations.
Bernays believed that the ideas emerging from psychology could be applied to business, politics, and mass communication. If human beings were guided by unconscious desires, then successful communication required more than presenting facts.
It required understanding emotions.
In his 1923 book Crystallizing Public Opinion and later works, Bernays argued that public opinion could be shaped by professional communicators who understood the psychological forces operating beneath public decisions.
He called this the “engineering of consent.”
The phrase sounds sinister today, but Bernays viewed it differently. He believed that modern democracies were too complex for citizens to personally evaluate every issue. Therefore, organized persuasion was inevitable. The question was not whether public opinion would be shaped, but by whom and for what purposes.
His critics saw something more troubling: the creation of techniques for manipulating populations.
Selling Products by Selling Identity
Bernays transformed advertising.
Earlier advertising often focused on practical arguments:
This product is cheaper.
This product works better.
This product lasts longer.
Bernays introduced something different.
He suggested that companies should not merely sell products. They should sell meanings.
A cigarette was not just tobacco. It could represent independence, sophistication, rebellion, or freedom.
A car was not merely transportation. It could represent success, masculinity, status, or personal identity.
A product could become a symbol of the person a consumer wanted to become.
One of Bernays’ most famous campaigns involved encouraging women to smoke cigarettes during the 1920s. At the time, smoking by women was socially restricted in many settings. Bernays worked with tobacco companies to associate cigarettes with female independence and liberation, famously promoting cigarettes as symbols of freedom during a public event.
The campaign demonstrated a revolutionary idea:
People could be persuaded not by changing their minds about a product, but by changing what the product represented.
The purchase became psychological.
The consumer was not buying an object.
The consumer was buying a story about themselves.
From Advertising to Politics
The same principles soon migrated from commerce into politics.
Political leaders discovered that voters were not simply responding to policy details. They responded to symbols, narratives, fears, hopes, and group identities.
A political message could succeed not because it contained the most information, but because it connected with the deepest emotions of the audience.
This did not mean facts became irrelevant.
It meant facts competed with something more powerful.
Meaning.
A statistic might inform.
A story might persuade.
A policy proposal might explain.
A symbol might inspire.
Modern politics increasingly became a contest over narratives: who people believed they were, who they feared, who they trusted, and what future they imagined.
The Rise of Propaganda and Mass Psychology
The twentieth century also revealed the darker possibilities of mass persuasion.
Totalitarian governments understood that controlling information was not enough. They needed to shape emotion. They used propaganda, repetition, imagery, and carefully constructed myths to create shared realities.
The techniques varied, but the psychological insight was similar:
People do not experience the world only through facts.
They experience it through interpretation.
The person who controls interpretation gains enormous power.
This became especially important as mass media expanded. Radio, film, television, and eventually the internet allowed messages to reach millions instantly.
Technology amplified the ancient human desire to persuade.
The Digital Age and the Collapse of Shared Reality
The internet has not invented misinformation.
Falsehoods, rumors, and propaganda existed long before computers.
But digital technology changed the scale and speed of their spread.
Traditional media operated through systems of selection and verification. Newspapers had editors. Broadcasters had gatekeepers. Institutions could be criticized, but they also created common reference points.
The internet disrupted that model.
Now every individual can publish.
Every community can create its own information ecosystem.
Every emotional reaction can be amplified.
The result is not simply more information.
It is more competing realities.
In this environment, the old lessons of Freud and Bernays have taken on new significance.
Human beings remain vulnerable to messages that appeal to identity, fear, belonging, and desire. The most successful communicator is often not the person who provides the most accurate information, but the person who understands the emotional landscape of the audience.
Truth in the Age of Persuasion
The challenge facing modern democracies is not that people are incapable of knowing truth.
It is that truth must compete in an environment designed for attention.
The human mind evolved to notice threats, stories, and social signals. It did not evolve for the modern world of endless information streams and algorithmic competition for attention.
The question is no longer simply:
Is this true?
It is also:
Why does this feel true?
Who benefits from my believing it?
What emotions are being activated?
What part of my identity is being appealed to?
These are not cynical questions. They are necessary questions for citizens living in a world where persuasion has become a science.
Freud revealed that the human mind contained hidden forces.
Bernays demonstrated that those forces could be appealed to.
Modern technology has given those techniques unprecedented reach.
The great democratic challenge of the twenty-first century may therefore not be the absence of information.
It may be learning how to preserve wisdom in a world where information, emotion, and persuasion are constantly competing for control of the human mind.