We often view political polarization as a social failure or an emotional reaction to changing times. We assume that if citizens just understood the facts, consensus would emerge.
A new paper by Nadav Kunievsky at the University of Chicago challenges this comforting narrative. It posits that polarization is not an accident: it is a strategic design choice made by political elites.
The logic is ruthless but compelling. Elites (politicians, party leaders, and interest groups) need public support to pass policies.
As Artificial Intelligence (AI) drives the cost of persuasion down to near zero, these leaders face a new incentive structure. They no longer need to accept public opinion as a fixed constraint. Instead, they can manufacture the precise level of division that best serves their long-term goals.
Crucially, this research reveals an “Efficiency Wall.” Elites do not want 60% or 70% support. They want exactly 51%, because anything more is a waste of resources, and a polarized public is cheaper to steer than a unified one.
Citation & Links
Title: Polarization by Design: How Elites Could Shape Mass Preferences as AI Reduces Persuasion Costs
Link: Elites and Persuasion – 2512.04047v1
Peer Review Status: Pre-print (Not yet peer-reviewed)
Citation: Kunievsky, Nadav. 2025. “Polarization by Design: How Elites Could Shape Mass Preferences as AI Reduces Persuasion Costs.” arXiv preprint arXiv:2512.04047.
Methodology
Kunievsky does not rely on experiments, surveys, focus groups, or interviews. Instead, the study employs Game Theory and dynamic economic modeling. The author builds a mathematical framework to simulate how a forward-looking “elite” (a decision-maker) behaves when they want to implement specific policies but face a majority-rule constraint.The model introduces a “cost of persuasion.” This variable represents the money and effort required to shift public opinion. The study then runs simulations under two scenarios:- A Single Elite: One dominant group holds power and seeks to maintain it while adapting to changing world states.
- Competing Elites: Two opposing groups alternate power and strategize against one another.
Results and Findings
The study uncovers a counterintuitive driver of division.- The Polarization Pull: A single elite has a strong strategic incentive to keep society polarized, defined here as a 50/50 split in opinion. A polarized society is easier to steer. If the world changes and the elite needs to flip a policy, moving a 50/50 public requires less effort than moving a consensus public.
- AI Accelerates Division: Historically, persuasion was expensive. High costs forced elites to tolerate consensus. As AI reduces these costs through micro-targeting and automated content generation, elites can afford to aggressively reshape opinion. The model shows that cheaper technology speeds up the drift toward maximum polarization.
- The Insurance Mechanism: Polarization acts as “strategic insurance”. By keeping the public clustered near the decision threshold (the majority line), elites retain flexibility. They can pivot quickly to new policies without incurring the massive cost of dismantling a deep social consensus.
- Competition Can Create “Lock-In”: When two elites compete, a different dynamic emerges. To prevent a rival from reversing policies in the future, a ruling elite might intentionally foster cohesion (consensus) to “lock in” their preferred policy.
Deep Dive: The Mathematics of the “Efficiency Wall”
To understand why an elite would want a divided country, look at Figure 1 above. This graph visualizes the “Efficiency Wall” and proves that polarization is an exercise in resource optimization.
- The “Cost Wall” (The Red Dashed Line) Notice the red dashed line in the graph. This represents the Cost of Persuasion. It is curved (convex), meaning it gets steeper as it goes up. Converting the first few voters is cheap, but converting the “die-hards” on the other side is astronomically expensive. In a polarized society, pushing support from 50% to 60% hits this “cost wall.” The price per vote skyrockets because you are trying to convert your strongest opponents. Elites accept the 50/50 split because breaking it is prohibitively expensive .
- The Optimization Gap (The Blue Line) The Blue Line represents the Benefit of winning. The elite’s goal is to maximize the vertical gap between the Blue Line (benefit) and the Red Line (cost). As the graph shows, this gap is often widest right at the threshold of power. Gaining more than 51% support yields the same fixed reward (H) but incurs the massive costs shown by the spiking red line. A rational elite stops exactly at the threshold needed to govern
- Option Value Imagine a political leader acts like a captain steering a ship. If the passengers form a consensus (90% want to go left), the ship lists heavily. Turning right requires moving a massive number of people, which is slow and costly. If the passengers are evenly split (50/50), the ship is balanced on a knife-edge. The captain only needs to nudge a tiny fraction of passengers to turn the vessel. Elites prefer the knife-edge because it provides the “option value” to pivot instantly if the world changes.
“Taken together, cheaper persuasion technologies recast polarization as a strategic instrument of governance rather than a purely emergent social byproduct.”
Why It Matters
This research reframes the conversation about AI and democracy. We typically worry that AI generates “misinformation.” Kunievsky suggests the content of the message matters less than the target of the persuasion.
The danger is not just that AI lies: the danger is that AI makes it economically rational for leaders to dismantle social consensus. If a unified society is harder to manipulate, leaders will use these tools to ensure we remain divided.
Critiques and Areas for Future Study
While the mathematical logic is sound, the study faces limitations inherent to theoretical modeling:
Spend anytime with political decision making, surveys, or in focus groups and any model of “rationality” flies out the window. Most humans are anything but rational. The model assumes elites act with perfect strategic rationality to maximize policy goals. It does not account for elite incompetence or irrationality or just simple human nature. (YES, all models are wrong, but some can be useful).
In addition, the model defines polarization on issues, but does not take into account or capture “affective polarization” or our hatred of other groups.
The model assumes a sharp discontinuity at 50%. In the real world, 50.1% of the vote rarely guarantees total power due to coalition dynamics or again just human nature.
Practical Implications for Public Affairs Officials
- Recognize the Strategy: When you see a sudden flare-up of divisive rhetoric on a settled issue, do not assume it is organic. It may be a strategic “softening” of the ground to create flexibility for a future policy pivot.
- The “Lock-In” Value: If you advocate for a cause, aiming for a 51% win is dangerous in an AI era. A narrow majority is cheap to overturn. Your goal must be “lock-in”or creating a consensus so strong that the opposition deems it too expensive to attack.
- Monitor “Persuasion Costs”: Watch the tools your opponents use. If they adopt cheaper AI generation tools, expect their attempts to fracture your coalition to increase.
Final Thoughts
A lot of pundints spend a lot of time asking if AI will become sentient and take over the world and or destroy it.
The more immediate threat is far more subtle: AI makes it efficient for our human leaders to keep us fighting one another.
Kunievsky’s work serves as a stark warning. Polarization is not just a symptom of a broken society; it is often a feature of a highly optimized political strategy.