SAY THE UNTHINKABLE, REPEAT IT, NORMALIZE IT
The Overton Window and the Brutal Mechanics of Social Change
There is a remarkably simple sentence that describes one of the most powerful mechanisms by which societies can change:
Say something shocking → repeat it → society accepts it.
It is not the formal definition of the Overton Window. It is a deliberately simplified description of one way people commonly understand the process by which an idea can move from the margins of public discussion toward the center.
The simplicity is precisely what makes the formulation disturbing.
A society does not normally wake up one morning and collectively decide that an idea which was previously unimaginable is now normal. There is usually a period in between: someone introduces the idea, somebody else repeats it, newspapers discuss it, television debates it, politicians respond to it, opponents attack it, supporters defend it, academics analyze it, celebrities mention it, social media circulates it and eventually people become accustomed to hearing the words.
The idea has entered the room.
At first, everyone looks at it.
Eventually, people stop looking.
And that is where the mechanics of normalization become interesting.
The Overton Window provides a framework for understanding this movement. But it is important to distinguish the original theory from the much broader claims sometimes attached to it. Joseph Overton’s original concept was not a psychological formula saying that repetition automatically makes people believe anything. It was a model describing the range of policies that, at a particular moment, are considered politically acceptable or realistically enactable. Overton developed the idea in the mid-1990s while working at the Mackinac Center for Public Policy. After his death in 2003, colleagues named the concept the “Overton Window” in his honor.
Yet the concept became useful far beyond its original policy context because it describes something larger:
The boundary of what a society considers possible can move.
And once that boundary moves, yesterday’s impossible can become today’s controversial, tomorrow’s acceptable and eventually, in some cases, tomorrow’s law.
1. THE WINDOW THAT DEFINES WHAT CAN BE SAID
Imagine a political or social spectrum.
At one end are ideas almost nobody is prepared to accept. At the other end are ideas so familiar that nobody questions their legitimacy.
Between them lies a narrower zone: the Overton Window.
Inside that window are ideas that politicians can publicly support without necessarily destroying their political careers. Outside it are ideas that may exist intellectually, philosophically or ideologically but are considered politically impossible.
That distinction is fundamental.
An idea does not need to be illegal to be outside the window.
It does not even need to be universally rejected.
It simply needs to be sufficiently unacceptable that a politician cannot safely make it part of mainstream policy.
The original Mackinac Center explanation describes the window as the range of policies considered politically acceptable at a particular time. Policies outside that range may be advocated, but politicians generally face much greater political risk in supporting them.
This produces an important paradox.
Politicians often appear to create social change.
But politicians frequently enter the process after the social climate has already changed.
As Joseph Lehman, one of Overton’s colleagues, later explained, lawmakers generally cannot simply enact whatever policies they personally prefer. They operate within the boundaries of what they believe their constituents will accept. In this model, changing political policy therefore often requires changing the surrounding political climate first.
The politician comes last.
The conversation comes first.
2. THE SHOCKING IDEA
The first stage is often the easiest to recognize.
An idea appears that sounds absurd, dangerous, immoral, impossible, radical or simply bizarre compared with the prevailing assumptions of the time.
People react.
They laugh.
They become angry.
They organize against it.
They write newspaper articles explaining why it cannot happen.
Television programs invite people to debate it.
Politicians are asked whether they support it.
And something subtle happens.
The question has changed.
Before the idea appeared, there was no question.
Now there is.
That difference matters.
The original idea may still have almost no public support. But it has acquired something it did not possess yesterday:
visibility.
This is one reason the simplified formula is so powerful:
Say the shocking thing.
Not necessarily because people immediately believe it.
But because the idea has now become discussable.
And discussability is not the same thing as acceptance.
It is the stage before acceptance.
3. THE SECOND STAGE: REPEAT IT
The second stage is repetition.
The idea appears again.
And again.
And again.
The same words become familiar.
At first they produce a reaction.
Later they produce an argument.
Eventually they may produce boredom.
That progression is psychologically important.
The American psychologist Robert Zajonc identified what became known as the mere-exposure effect: repeated exposure to a stimulus can increase people’s preference for it, particularly when there is no strong pre-existing negative attitude toward it. The American Psychological Association defines the effect as increased liking or preference resulting from repeated exposure.
But this should not be exaggerated into a magic formula.
Repeated exposure does not mean that people automatically accept every proposition they hear.
People can become more hostile to an idea through repetition. They can become more knowledgeable about it. They can become more polarized. They can become desensitized to it. They can simply become tired of hearing it.
Nevertheless, repetition can change the psychological status of an idea.
Something unfamiliar becomes familiar.
And something familiar requires less explanation.
This is where the simplified formula becomes useful:
Say something shocking → repeat it → society accepts it.
The arrow is not a law of psychology.
It is a description of a possible social trajectory.
4. FROM SHOCK TO DEBATE
There is a critical middle stage between shock and acceptance:
Say something shocking → repeat it → society accepts it.
This stage is frequently misunderstood.
A society does not need to agree with an idea for the idea to advance through the public sphere.
It only needs to discuss it.
Imagine a newspaper headline:
SHOULD WE ALLOW X?
The question itself has already accomplished something.
It has moved X from outside the conversation into the conversation.
The next day another article asks:
WHAT WOULD HAPPEN IF WE ALLOWED X?
A television program asks:
IS OPPOSITION TO X OUTDATED?
A politician says:
I DON’T PERSONALLY SUPPORT X, BUT WE SHOULD BE ABLE TO DISCUSS IT.
Another says:
PEOPLE WHO SUPPORT X HAVE A POINT.
Another says:
WE SHOULD CONSIDER A LIMITED VERSION OF X.
And gradually the conceptual distance between “impossible” and “possible” becomes smaller.
This is not necessarily manipulation.
It can be genuine democratic deliberation.
Sometimes societies reconsider an old assumption because evidence changes.
Sometimes a previously excluded group gains political representation.
Sometimes a technological development makes an old policy obsolete.
Sometimes a moral argument that was ignored becomes persuasive.
Sometimes activism changes public consciousness.
Sometimes political organizations deliberately attempt to move the window.
The mechanism does not tell us whether the resulting change is good or bad.
It only helps describe how the boundary of political possibility can move.
5. THE BRUTALITY OF NORMALIZATION
The word “brutal” is useful here—not as a scientific description of the Overton Window, but as a description of how the process can feel from inside a society experiencing rapid change.
Because normalization does not require everybody to agree.
It requires something much weaker:
people becoming accustomed to the existence of an idea.
That is a profound distinction.
Imagine that an idea is introduced in 2000 and produces outrage.
Ten years later it is debated.
Ten years after that it is represented in popular culture.
A decade later a politician proposes legislation concerning it.
Eventually the law is passed.
Someone born at the beginning of the process may remember the original controversy.
Someone born at the end may wonder why anyone ever considered the issue controversial.
The younger generation encounters the final position as a starting point.
The historical controversy disappears from lived experience.
That is one of the most powerful aspects of cultural change.
Yesterday’s revolution becomes today’s background.
6. THIS IS NOT THE SAME AS “SOCIETY EVOLVED”
The phrase “society evolved” is often used to describe social change.
Sometimes that description is appropriate.
But it can also conceal the mechanism.
Societies do not possess a single brain that independently decides to evolve.
Ideas are introduced by people.
Arguments are constructed by people.
Campaigns are organized by people.
Institutions promote ideas.
Movements promote ideas.
Political parties promote ideas.
Universities study ideas.
Media organizations select ideas for attention.
Businesses sometimes market ideas.
Artists and entertainers represent ideas.
Activists normalize ideas.
Governments legislate ideas.
The resulting transformation can later appear almost organic.
But the process may have involved decades of deliberate effort.
The history of the Overton Window is therefore not simply the history of society “evolving.”
It is also the history of people attempting to move the boundaries of what other people consider possible.
The Mackinac Center itself explicitly describes think tanks as organizations capable of shifting the political climate by researching, communicating and advocating ideas that may initially be outside the politically acceptable range.
The mechanism can be used by different ideological movements.
That is precisely why the concept is more useful as an analytical tool than as an ideological weapon.
The window has no political party.
It can move in multiple directions.
7. THE HISTORY OF THE THEORY
The name sounds older than it actually is.
The Overton Window is not an ancient theory of mass psychology.
It was developed by Joseph P. Overton, a senior vice president of the Mackinac Center for Public Policy in Michigan, during the 1990s. Overton was interested in the relationship between public opinion, policy ideas and political feasibility.
His insight was relatively straightforward.
Politicians are constrained.
A politician may personally believe something that is politically impossible to enact.
A think tank may publish a proposal that nobody in government is prepared to support.
A movement may demand something that most voters currently reject.
But the political environment can change.
If public opinion changes, the politically acceptable window can move.
An idea that was once impossible can become politically feasible.
After Overton’s death in 2003, his colleagues named the model after him, and the concept subsequently spread into mainstream political vocabulary.
Interestingly, the theory was never intended to be a grand unified theory of human behavior.
Lehman later emphasized that there was no enormous academic theory hidden behind it. It was fundamentally a model explaining the relationship between ideas, public opinion and political possibility.
That limitation is important.
The Overton Window is best treated as a framework, not a universal law.
8. AN EXAMPLE: SAME-SEX ADOPTION
One of the clearest contemporary examples of a social issue that moved substantially through the public and political spectrum is adoption by same-sex couples.
It is important, however, to describe the history precisely rather than reducing it to a simplistic story.
The idea was not simultaneously “shocking” everywhere, nor did every society move through exactly the same sequence.
Attitudes varied considerably between countries and within countries.
But measurable changes in public opinion and law can be documented.
In the United States, for example, a 2006 Pew Research Center survey found that 52% opposed allowing gay and lesbian couples to adopt children while 42% supported it.
By 2012, Pew reported that 52% of Americans favored allowing gay men and lesbians to adopt children, while 42% opposed it. Pew also observed that support had increased over the preceding decade.
That is not a tiny movement.
It represents a reversal in the balance of public opinion.
And the broader cultural transformation is visible in other measurements as well.
For same-sex marriage, Pew’s long-term U.S. data show support rising from 31% in 2004 to 63% in 2023, while opposition fell from 60% to 34%.
Legal systems changed alongside these shifts.
In England and Wales, the Adoption and Children Act 2002 created a legal framework allowing civil partners and unmarried couples, including same-sex couples, to adopt; the relevant provisions came into force on December 30, 2005.
Today, UK government guidance explicitly states that an unmarried couple may adopt and specifies that this includes same-sex and opposite-sex couples.
That gives us something much more interesting than the vague statement:
“Society evolved.”
We can actually observe a sequence:
controversial idea → public argument → changing attitudes → institutional change → legal recognition → normalization.
But there is another important lesson.
The process was not merely the result of people hearing the same sentence repeatedly.
Public attitudes were affected by many factors: changing personal relationships, visibility of gay people in society, political activism, legal decisions, generational differences, media representation, religious and cultural changes, and arguments about equality and parenting.
The Overton Window describes the movement of the acceptable political range; it does not by itself establish which particular cause produced the movement.
9. THE WINDOW CAN MOVE WITHOUT PEOPLE NOTICING
Perhaps the most interesting feature of normalization is that people living through it often do not recognize the change while it is happening.
Consider the difference between these statements:
“This must never happen.”
Then:
“We need to debate whether this should happen.”
Then:
“Perhaps there are circumstances in which this could happen.”
Then:
“The law should permit this under certain circumstances.”
Then:
“Why would anyone oppose this?”
The underlying proposition may be almost identical.
But the social position of the proposition has changed dramatically.
That is the window moving.
And this is why the process can be so powerful.
The individual does not necessarily feel that he or she has been persuaded.
Instead, the individual may simply notice that the surrounding environment has changed.
The question is no longer:
“How could anybody possibly believe this?”
It becomes:
“Why shouldn’t people be allowed to believe this?”
Then:
“Why shouldn’t this be legal?”
Then eventually:
“Why was this ever controversial?”
At that point, the transformation has become cultural memory.
10. SHOCK IS NOT ALWAYS THE ENEMY
There is another important complication.
A shocking idea is not necessarily a bad idea.
Some ideas that were once considered radical later became widely accepted.
The Mackinac Center itself points to historical examples such as women’s suffrage, civil rights protections, interracial marriage and gay rights as ideas that were once outside prevailing political norms and later became broadly accepted in important jurisdictions.
This creates a difficult question:
If an idea is initially rejected by society, does that mean society is correct?
No.
But the opposite conclusion is equally invalid:
If an idea was once rejected and later accepted, does that prove that every shocking idea deserves acceptance?
Again, no.
The Overton Window is morally neutral.
It can describe the movement of a window without telling us whether the movement represents justice, injustice, progress, regression, freedom, restriction, wisdom or foolishness.
That distinction is essential.
A window can move in either direction.
11. THE DARKER POSSIBILITY: NORMALIZATION WITHOUT ARGUMENT
The genuinely troubling possibility is not that people debate controversial ideas.
Democratic societies require debate.
The troubling possibility is that familiarity can replace examination.
If an idea is repeated often enough, people may stop asking why it is being discussed.
The repetition itself becomes evidence of importance.
“This is everywhere.”
“Everyone is talking about it.”
“Everybody knows about it.”
But none of those statements establishes whether the underlying proposition is true.
This creates a potential feedback loop:
visibility creates discussion; discussion creates visibility; visibility creates familiarity; familiarity makes further discussion easier.
The process can accelerate.
Social media makes this especially obvious.
A controversial statement produces outrage.
Outrage generates engagement.
Engagement generates distribution.
Distribution produces more discussion.
More discussion generates more engagement.
The algorithm sees activity and provides more of the same.
Suddenly an idea that may represent a tiny minority position appears to be everywhere.
Its visibility has become disproportionate to its support.
That is a crucial distinction.
The Overton Window concerns political acceptability, not simply online visibility.
But modern communications can influence the environment in which that acceptability is formed.
12. THE DIFFERENCE BETWEEN PERSUASION AND NORMALIZATION
There are two different processes that are often confused.
Persuasion says:
Here is an argument. Examine it. Decide whether it is convincing.
Normalization says:
Here is the idea. Become accustomed to its presence.
The two processes can happen simultaneously.
An activist may argue passionately for a new policy.
At the same time, movies may portray the policy’s consequences.
News organizations may cover it.
Politicians may debate it.
Universities may research it.
Children may grow up seeing it.
Eventually the idea no longer feels foreign.
That does not mean everybody has been logically persuaded.
Something else has happened.
The reference point has moved.
13. THE GENERATIONAL EFFECT
Generational change makes the process particularly powerful.
A person who was twenty years old when an idea was introduced may remember the controversy.
A person born twenty years later may encounter the idea as ordinary reality.
These two people are not beginning from the same psychological position.
For the first person:
“I remember when people were shocked by this.”
For the second:
“Why would anyone have been shocked?”
The younger generation did not necessarily undergo the original persuasion campaign.
They inherited the new window.
This is one reason cultural change can become self-sustaining.
Once the window has moved, the next generation begins its reasoning from the new position.
Yesterday’s boundary becomes today’s starting line.
14. WHY REPETITION CAN BE MORE POWERFUL THAN ARGUMENT
A good argument asks the listener to think.
Repetition sometimes asks the listener simply to become familiar.
That distinction matters.
Suppose someone hears a completely unfamiliar concept once.
The brain must categorize it.
Is this serious?
Is this ridiculous?
Is this dangerous?
Is this possible?
Who believes this?
Then the person encounters it again.
And again.
Eventually the brain no longer needs to spend as much energy determining what the thing is.
It already knows.
The concept has acquired a mental category.
This is where the psychology of familiarity intersects with the political concept of the Overton Window.
The mere-exposure effect does not prove that repeated political messages automatically produce political acceptance. But it does provide a scientifically documented reason why repeated exposure can change people’s relationship with familiar stimuli.
The political process adds another layer:
Once enough people are willing to discuss an idea, politicians can begin treating it as politically relevant.
That is the bridge from psychology to politics.
15. FROM THE UNTHINKABLE TO THE INEVITABLE
One of the most striking descriptions of the Overton Window comes from its own intellectual history.
Joseph Overton’s colleagues described his insight as the movement of ideas from “unthinkable” positions toward policies that become politically possible. The process can take days or decades.
The timeline is unpredictable.
Some ideas remain outside the window for centuries.
Some move rapidly after a major crisis.
Some become accepted because of demographic change.
Some because of technological change.
Some because of economic necessity.
Some because of organized political campaigns.
Some because of court decisions.
Some because of changes in moral philosophy.
Some because people simply become accustomed to seeing something that was once unfamiliar.
And sometimes the window moves backward.
An idea can be mainstream in one generation and unacceptable in another.
There is no permanent guarantee that an idea will remain inside the window.
16. THE FORMULA
If the entire mechanism had to be reduced to one deliberately crude sentence, it would be this:
SAY THE SHOCKING THING → REPEAT IT → DEBATE IT → NORMALIZE IT → MOVE THE WINDOW
Or, in the shorter formulation:
Overton Window
The first version is more accurate.
The second is more memorable.
And the difference between them is important.
The shorter formula suggests inevitability.
The longer formula describes a possibility.
Not every shocking idea becomes accepted.
Not every repeated idea becomes normal.
Not every debated idea enters the Overton Window.
And not every idea inside the window becomes law.
There are always competing forces.
Opposition can organize.
Counterarguments can prevail.
Evidence can destroy a proposal.
Religious beliefs can resist cultural change.
Economic realities can make a policy impossible.
Courts can block legislation.
Elections can reverse political direction.
A social movement can collapse.
A scandal can destroy credibility.
A new generation can reject the assumptions inherited from the previous one.
The window is movable.
It is not infinitely movable.
17. THE MOST IMPORTANT QUESTION
The most important question is therefore not:
“Is the Overton Window real?”
As a model of political possibility, its basic concept is well documented.
The more interesting question is:
“Who is trying to move the window?”
That question changes the entire analysis.
When a controversial idea suddenly appears everywhere, ask:
Who introduced it?
Who funds the organizations promoting it?
Who benefits politically?
Who benefits economically?
Who provides the media platform?
Who is opposing it?
What evidence supports the competing claims?
What has actually changed in public opinion?
What has changed in law?
What remains controversial?
And perhaps most importantly:
Are people being persuaded by arguments, or are they simply becoming accustomed to the presence of the idea?
Those are not the same thing.
18. THE WINDOW IS NOT THE TRUTH
This may be the most important conclusion.
The Overton Window measures neither truth nor morality.
It does not tell us what is right.
It does not tell us what is wrong.
It does not tell us whether a social change constitutes progress.
It tells us something more uncomfortable:
What a society considers possible can be changed.
And because it can be changed, the people who control the conversation can sometimes influence the boundaries of political possibility.
That influence can be used for causes later regarded as historic advances.
It can also be used for causes later regarded as disastrous.
The mechanism itself does not choose.
Human beings choose.
That is why the most intellectually honest way to discuss the Overton Window is neither to worship it as a theory of progress nor to dismiss it as a conspiracy formula.
It is a framework for examining the movement between ideas, public discourse, social acceptance and political possibility.
The history of same-sex adoption illustrates how dramatically such boundaries can change. In the United States, public opinion shifted from majority opposition in 2006 to majority support by 2012 in Pew’s measurements, while legal systems such as England and Wales incorporated same-sex couples into the adoption framework during the 2000s.
Whether one celebrates or questions any particular change is a separate question.
The mechanism remains.
An idea enters.
People react.
The argument begins.
The idea is repeated.
The argument becomes familiar.
The familiar becomes discussable.
The discussable becomes politically possible.
The politically possible becomes policy.
And eventually someone who was born after the entire process is finished may look at the result and wonder why anybody ever thought it was impossible.
That is the quiet power of a moving window.
It does not necessarily force the door open.
It changes the definition of where the door is.
