If polarization has causes, it may also have remedies. Researchers have tested many interventions, from quick online messages to weekend deliberations to changes in electoral rules. The results are encouraging in some ways and humbling in others, and they point toward a new way of thinking about the problem.
Correcting misperceptions
Because false polarization is so large, one of the simplest approaches is to correct people's mistaken beliefs about the other side. When Ahler and Sood told participants the real makeup of the parties, hostility fell somewhat. Studies by Samantha Moore-Berg, Jeffrey Lees, Mina Cikara and others found that partisans greatly overestimate how much the other side dislikes and dehumanizes them. Telling people what opponents actually think of them reduced their own hostility. These are cheap interventions that can reach many people, though effects tend to fade without reinforcement.
Contact
The psychologist Gordon Allport, in The Nature of Prejudice (1954), proposed the contact hypothesis: contact between groups reduces prejudice under the right conditions, namely equal status, shared goals, cooperation and support from authorities. Decades of research, mostly on racial and ethnic groups, have broadly supported it. For partisans, structured conversations of the kind organized by groups such as Braver Angels, founded in 2016, apply this idea. Studies of cross-party conversations report reduced hostility, at least in the short term.
Deliberation
In September 2019, the political scientists James Fishkin and Larry Diamond brought a representative sample of 526 American voters to a hotel near Dallas for a project called America in One Room. Over a long weekend, participants discussed immigration, the economy, health care and other issues in small mixed groups, with balanced briefing materials and questions to experts. Many participants moved toward the center on several proposals, and proposals that were most polarizing tended to lose support. Participants also reported warmer views of the other side. The limitation is scale: it is hard to put a whole country in one room.
The megastudy
The most ambitious test so far was the Strengthening Democracy Challenge, led by Jan Voelkel, Robb Willer and colleagues. Researchers and practitioners submitted ideas, and 25 short interventions were tested on more than 30,000 Americans. Most of them reduced partisan animosity, some substantially. But a central finding was humbling: reducing animosity did not reliably reduce support for undemocratic practices or partisan violence, and different interventions were needed for those. Effects also tended to shrink over the following weeks.
This points to a fresh way of framing the goal. Warmer feelings are good, but the core aim is protecting democratic rules and equal citizenship. Interventions that worked on that aim included showing people concrete examples of what democratic breakdown looks like, and correcting exaggerated beliefs about how much the other side supports breaking the rules.
Changing the rules
Some reformers focus on institutions. Proposals include proportional representation and multi-member districts, which could allow more than two parties; ranked-choice voting, used statewide in Maine and Alaska for some elections; open or nonpartisan primaries; and independent redistricting commissions. The arguments for these are serious, drawing on the comparative evidence in Level 6. The direct evidence on their effect on polarization is still limited, and in some places reforms have been reversed after a few elections. Honest advocates acknowledge that changing rules is slow and the effects uncertain.
Restoring cross-cutting ties
If Mason's mega-identity theory is right, another path is to rebuild identities that cut across party lines: local communities, sports, faith groups, workplaces, national service, and civic projects where partisanship is irrelevant. Research suggests that reminding people of shared identities, such as being American or being parents, can briefly lower partisan hostility. These approaches are less about changing minds than about giving people more reasons to see each other as neighbors.
What leaders can do
Because voters follow elite cues, leaders matter. Experiments find that when politicians model respect for opponents, or when a leader of one's own party affirms that the other side's voters are decent people, hostility drops among followers. Leaders who concede defeat graciously strengthen democracy for everyone.
Worked example: a town council
A town council has become bitterly divided between two factions over development. Meetings end in shouting, and residents describe the other faction as corrupt. Drawing on this course, what might help?
First, measure carefully: a private survey might reveal that residents agree on more than they think, which could be shared publicly to correct false polarization. Second, apply contact theory: a working group with equal numbers from each side, a shared goal and a neutral chair. Third, borrow from deliberation: give the group balanced facts and time. Fourth, focus on rules, not just feelings: both factions could commit in advance to accept the result of a fair process, whichever way it goes. Finally, ask leaders on each side to say publicly that the other side's supporters care about the town. None of these steps requires anyone to abandon their views. They aim instead to restore what Madison thought a free society must manage: disagreement among equals who still share a common life.