The Unwritten Rules That Hold Systems Together

Why It Matters

There is a sentence that appears in political writing so often that it has become a cliché: 'Our democratic institutions are under threat.' But what does 'institution' actually mean in that context? Most people, when they hear it, picture buildings — the Capitol, the Supreme Court, the White House. Those aren't the institutions. The institutions are the norms that govern behavior within those buildings: the expectation that a losing candidate will concede an election, that a president will not use the Justice Department to prosecute political opponents, that a senator will allow a judicial confirmation hearing to proceed, that a president will not pardon his own co-conspirators.

None of those things are laws. You cannot be arrested for violating any of them. They are norms — informal expectations, enforced not by courts but by the political and social costs of deviation. For most of American history, those costs were real enough that the norms held. The question that contemporary politics has reopened is what happens when a sufficiently powerful actor decides that the political costs of norm violation are worth paying — or when they discover that those costs are lower than expected.

This lesson is about the invisible architecture beneath the written constitution. Understanding it is essential preparation for reading political events not just as drama but as structural signals: when a norm is violated, what does the reaction (or its absence) tell you about the system's health?

A Story

The Guardrails

In 1789, the United States Constitution created a Senate with the power to confirm or reject the president's judicial nominations. The document said nothing about how long the Senate should take to act, whether it was required to hold hearings, or what constituted a reasonable process. Those details were left to practice — to norms that would develop over time and be enforced by political culture rather than law.

For most of American history, the norm was that presidents would submit nominations and the Senate would vote up or down within a reasonable period, sometimes quickly, sometimes after contentious hearings. Even nominees who faced strong opposition were generally given a floor vote. The norm was not that the Senate would confirm all nominees — it was that the process would proceed.

In February 2016, Justice Antonin Scalia died with ten months remaining in President Obama's second term. Obama nominated Merrick Garland, a widely respected federal appellate judge, to fill the vacancy. Senate Majority Leader Mitch McConnell announced within hours that the Senate would not hold hearings or vote on any Supreme Court nominee until after the presidential election — a period of nearly a year. The seat remained vacant for the remainder of Obama's term. After the 2016 election, the new president nominated Neil Gorsuch, who was confirmed.

In 2020, Justice Ruth Bader Ginsburg died 46 days before a presidential election. The same Senate Majority Leader who had refused to hold a hearing in 2016 now moved to confirm a nominee — Amy Coney Barrett — within weeks, before the election. The stated rationale from 2016 — that the Senate should not confirm justices in an election year — was explicitly abandoned.

What happened here was not a legal violation. The Constitution does not specify how long the Senate must wait, or whether it must act at all. Both actions were constitutionally permissible. What was violated was a norm — the expectation that the Senate would process nominations on their merits rather than as instruments of partisan strategy. The norm had existed, imperfectly, for over two centuries. It was discarded.

The consequences unfolded in ways the norm's destroyer may not have fully anticipated. Democrats, having observed that the norm no longer held, began discussing expanding the Supreme Court — something that had been politically toxic since Roosevelt's court-packing failure in 1937. The legitimacy of the Court's composition became a partisan talking point. Confirmation hearings, already contentious, became increasingly viewed as theater rather than genuine scrutiny. The norm's erosion changed the political environment in ways that extended far beyond the specific nominations involved.

Consider a different kind of norm erosion: the expectation that a losing presidential candidate will concede the election and cooperate in the peaceful transfer of power. This norm has no legal enforcement mechanism. A president who refuses to concede cannot be physically removed for the act of refusing to concede — removal requires the formal processes of impeachment or the conclusion of the term. The norm was maintained for two centuries not because it was legally required but because every losing candidate understood that democratic legitimacy depended on it, and that violating it would impose catastrophic political costs. When that calculation changes — when a losing candidate concludes that the political costs of refusal are lower than the political costs of concession — the norm breaks. And once broken, it is extremely difficult to restore.

The common thread in both examples is this: norms that are maintained by anticipated political costs will hold only as long as those costs remain real. When an actor discovers that the costs are lower than expected — when norm violation produces less backlash than predicted, or when the actor's political base rewards rather than punishes the violation — the norm weakens. And a weakened norm is available for the next actor to weaken further. The erosion is cumulative and asymmetric: it is much easier to destroy a norm than to rebuild it.

Vocabulary

Constitutional norm

An unwritten but widely observed expectation about how political actors should conduct themselves within a constitutional system. Enforced by political and social costs rather than law, and therefore dependent on the willingness of political actors and the public to impose those costs.

Mutual toleration

The norm that political opponents accept each other as legitimate competitors for power rather than existential enemies to be destroyed. Identified by political scientists Steven Levitsky and Daniel Ziblatt as one of the two most critical democratic norms.

Institutional forbearance

The norm that politicians exercise restraint in using their legal powers — that they refrain from actions that are technically legal but would damage the system. The other of Levitsky and Ziblatt's two critical democratic norms.

Norm cascade

The process by which a norm erodes rapidly once a prominent actor violates it without sufficient consequences. Because norms are maintained by the expectation of costs, a high-profile violation that goes unpunished signals to other actors that the norm is no longer enforced.

Guided Teaching

Begin with a personal analogy before moving to the political. Ask: 'In your family or friend group, what are the unwritten rules — the things everyone knows are expected but no one has written down? What happens when someone breaks one?' Most students can readily identify these: the expectation that a guest at dinner helps clean up, that a friend texts back within a reasonable time, that a teammate shows up to practice even when it's optional. Ask: 'What enforces those rules? What happens when someone violates them repeatedly?' The answer is social costs — friction, damaged relationships, exclusion from the group. Political norms work the same way, at a larger scale and with higher stakes.

On the Garland/Barrett episode, resist making it partisan. The lesson here is not about which party was right or wrong. It is about the mechanism of norm erosion. Ask: 'What is the difference between what McConnell did in 2016 and what he did in 2020? Were both constitutional? Were both consistent with the same norm?' The answer to the first two questions is yes; the answer to the third is clearly no. The lesson is about the pattern: a norm was applied selectively, then discarded when inconvenient. Once that pattern is visible, ask what it does to the norm going forward. Can a norm survive being applied only when convenient?

Ask: 'Why does a losing candidate's concession matter if it has no legal effect?' The concession is a ritual of norm affirmation: it signals that the losing candidate accepts the legitimacy of the process, which in turn signals to their supporters that their loyalty to the losing candidate should not prevent them from accepting the outcome. When that signal isn't given, what happens to supporters who take their political cues from the candidate? This is the mechanism by which norm erosion at the elite level translates into instability at the mass level.

Introduce Levitsky and Ziblatt's two key norms: mutual toleration and institutional forbearance. Mutual toleration means treating your political opponents as legitimate competitors rather than existential enemies to be destroyed. Institutional forbearance means restraining yourself from using legal powers in ways that would damage the system. Ask: 'Which of these norms do you think is more important? Which is more fragile?' There's no single right answer, but the discussion should produce the insight that both are necessary: mutual toleration tells you whether to fight, institutional forbearance tells you how to fight.

Ask: 'Once a norm is eroded, can it be rebuilt?' This is a hard question, and the honest answer is: slowly, imperfectly, and only with deliberate effort. Norms rebuild when violations consistently produce costs high enough to deter future violations, when leaders on both sides demonstrate forbearance even when it's politically costly, and when the public treats norm violations as serious rather than normalizing them. Ask: 'What is the public's role in maintaining norms?' If norm violations are rewarded at the ballot box, the political costs that enforce norms disappear. The public that normalizes norm violation by rewarding it is itself participating in the erosion.

End with the personal level. Ask: 'Can you think of a norm in your own life — in a group you belong to — that has been eroded? What caused the erosion? What did it cost the group?' The transition from the political to the personal isn't just an analogy — it's the actual mechanism. Political cultures are made up of millions of individual decisions about whether to uphold or erode the norms that govern shared life. A student who understands this will eventually be one of those decision-makers.

For Discussion

1. 1.What is the difference between a constitutional norm and a constitutional rule? Give an example of each.
2. 2.Why does a losing candidate's concession matter if it has no legal effect? What does it signal, and to whom?
3. 3.What is institutional forbearance? Can you think of a situation where a political actor used a legal power in a way that was constitutionally permitted but normatively destructive?
4. 4.Why are norms harder to rebuild than to destroy? What would rebuilding an eroded norm actually require?
5. 5.Can a democracy survive without the norms of mutual toleration and institutional forbearance? What happens to political competition when opponents stop treating each other as legitimate?

Practice

The Norm Inventory

1. 1.This exercise has two parts — one personal, one political.
2. 2.Part 1: Choose a group you belong to (a team, a family, a friend group, a class). Make a list of five unwritten rules — expectations that everyone in the group shares but that are not formally stated anywhere.
3. 3.For each norm, answer:
4. 4.1. What enforces this norm? (What are the costs of violating it?)
5. 5.2. Has this norm ever been violated? What happened?
6. 6.3. Is this norm getting stronger or weaker over time? Why?
7. 7.Part 2: Choose one political norm from the following list and research one real instance of its violation:
8. 8.- The norm of conceding elections
9. 9.- The norm of allowing opposition party nominees a confirmation hearing
10. 10.- The norm of using pardons for individual clemency rather than to protect political allies
11. 11.- The norm of the sitting president not publicly criticizing the Federal Reserve
12. 12.For the political norm you choose, answer:
13. 13.1. What is the norm? Where did it come from (history, tradition, practical necessity)?
14. 14.2. Who violated it, when, and under what circumstances?
15. 15.3. What consequences, if any, did the violation produce?
16. 16.4. Has the norm recovered, or has the violation weakened it?
17. 17.Discuss with a parent: how are the dynamics in your personal norm inventory similar to the political norm you analyzed? What is different?

Memory Questions

1. 1.What is a constitutional norm, and how is it different from a constitutional rule?
2. 2.What are Levitsky and Ziblatt's two critical democratic norms? Define each.
3. 3.What is a norm cascade, and what makes it hard to stop?
4. 4.Why does a losing candidate's concession matter even though it has no legal force?
5. 5.What does it mean for a political actor to follow the letter but violate the spirit of a constitutional norm?