The Rule of Law Is Not a Slogan—It’s a Test

Every politician in Washington says he believes in the rule of law. It is the safest applause line in American politics, right up there with standing for the anthem and promising to fight for the American people. But the phrase has been repeated so often, by people who would not recognize its actual demands, that it has become decorative. Like many words in our politics, it now means almost nothing because it is asked to mean everything.

Let me be blunt. The rule of law is not a mood. It is a test. And the test is whether a free person can know the law before he acts, whether the same law applies to the ruler and the ruled, and whether judges enforce the text as written rather than their own preferences.

By that standard, the gravest threat to the rule of law today is not merely the occasional lawbreaker. It is the growing portion of American government that no longer operates under law in any meaningful sense. The real story, the one rarely told, is that we are drifting from a government of laws to a government of discretionary power: vague statutes, unpublished agency guidance, after-the-fact interpretations, and prosecutorial selection. That is not law. It is a permission slip for men with badges and titles to rule other men.

The Hayek Test

Friedrich Hayek put the requirement plainly in The Road to Serfdom. He wrote that nothing distinguishes conditions of a free country from those under arbitrary government more than the observance of the great principles known as the rule of law. But notice what Hayek meant. He did not mean merely that government follows its own procedures. A tyrant can follow his own procedures while still crushing liberty. Hayek meant something more demanding: law must be general, certain, and equally applied. It must be knowable in advance, so ordinary people can plan their lives without fearing that some bureaucrat will redefine their conduct after the fact.

Think about what that means in practice. If a law is so vague that no reasonable person can tell what it prohibits, it is not law. It is a blank check. If a rule is buried in three hundred pages of agency guidance, written after you acted and still used to punish you, that is not law. It is a trap. If the same conduct is a crime when the government dislikes you and quietly ignored when it doesn't, that is not law. It is power.

John Adams captured the ideal in the Massachusetts Constitution of 1780: "a government of laws and not of men." That line is quoted constantly and understood too little. A government of laws is not a government where everyone in power has a law degree. It is a government where the rules are fixed, public, and enforceable against the rulers themselves. The moment the rules become flexible enough to suit the convenience of the people in charge, you no longer have a republic. You have rule by discretion, and discretion in the hands of the state is another name for arbitrary power.

The Quiet Inversion

Here is the angle we do not discuss enough: the modern administrative state has not abolished the rule of law by gunfire. It has dissolved it by complexity and discretion.

Congress passes thousand-page statutes that no member has fully read and no citizen could. The text no longer decides the hard questions; it delegates them. Agencies then issue rules that carry criminal penalties but lack the clarity of real criminal law. Then they add guidance documents, FAQs, and enforcement policies that are not voted on by Congress, not subject to public comment, and often not even published in a form a citizen can find. A business owner, a farmer, a small landlord can be prosecuted for missing a rule that no reasonable person would know existed.

Suppose you drain a low spot on your own land to plant a crop. Three years later, an agency issues guidance saying that similar ground was a jurisdictional wetland under its new interpretation. Now you are facing fines, mitigation costs, and possibly criminal referral, not for violating a law you could have read, but for failing to predict how unelected administrators would later reinterpret their own vague authority. That is not law. It is a trap baited with good intentions.

And we still repeat the old maxim that ignorance of the law is no excuse. That maxim only makes sense when the law is reasonably knowable. When the law is a vast, shifting code that even specialists cannot master, the maxim becomes a weapon. We have effectively criminalized ordinary life and then told citizens it is their job to guess the rules.

The legal system compounds the problem. For decades, judges deferred to agencies on the meaning of ambiguous statutes under a doctrine called Chevron deference. The result was predictable: agencies wrote ambiguity on purpose, because ambiguity gave them power. If a statute was unclear, the agency got to decide what it meant, and then change its mind later. The Supreme Court's Loper Bright decision in 2024 finally ended that particular form of judicial surrender, and that was a good and necessary correction. But the larger habit remains. Many courts still treat vague statutes as an invitation to impose their own view of good policy. And too many legislators prefer vagueness because it lets them take credit for doing something while shoving the hard decisions, and the blame, onto unelected rule-makers.

The fight against arbitrary power is older than America. Magna Carta was not about parchment; it was about forcing King John to be bound by law he did not make and could not bend at will. The Founders understood that history. That is why they wrote a Constitution of enumerated powers and separated branches. They did not intend to replace one king with a thousand regulators.

The Price You Don't See

This is where the economist's lesson matters most, and it is the part the political class never mentions.

The visible benefit of vague delegation is speed and flexibility. Congress can pass a broad bill, an agency can respond to evolving circumstances, and no one has to make a hard choice in public. The unseen cost is paid by every ordinary citizen who hesitates to start a business, hire a worker, build a home, or speak his mind because he cannot know whether he is breaking a rule.

Henry Hazlitt taught generations of readers to look for what is not seen. The broken window looks like economic activity; the unseen cost is the suit, the plow, or the schoolbook that never gets bought. The same logic applies to law. The flexibility of the administrator looks like responsive government; the unseen cost is the business never started, the family farm never expanded, the young worker never hired, all because the rules are too uncertain to plan around.

The rule of law is not just a criminal-justice principle. It is the foundation of economic and political freedom. Milton Friedman spent decades explaining that economic freedom and political freedom are inseparable. But economic freedom assumes you can know the rules of the game. If the rules change without notice, if the referee can penalize you after the play, then the market is not free; it is managed. And a managed economy eventually means managed people.

Hayek saw this too. The knowledge problem, the fact that no central planner can know enough to direct a free people, applies to law as much as to economics. A free people generate order through settled rules and impartial application, not through the real-time discretion of agencies and prosecutors. When central authorities claim the right to decide after the fact what conduct was wrong, they are not enforcing law; they are exercising raw power.

Thomas Sowell has spent a lifetime documenting the gap between intentions and results. The people who wrote vague statutes and delegated broad powers intended to make government more efficient, more expert, more responsive. The result has been less liberty, more uncertainty, and a legal system that treats ordinary citizens as presumptively guilty until they can prove they navigated a maze no reasonable person could navigate.

What Restoration Looks Like

The answer is not complicated. It is the original design.

The first requirement is that statutes must be clear enough that ordinary people can know their obligations. Congress should not be allowed to pass an eight-hundred-page bill and delegate the real content to unelected administrators. If a law cannot be explained to a citizen in plain terms, it should not be a law.

The second requirement is that rules must be public and prospective. No after-the-fact guidance. No secret enforcement policies. If the government wants to punish conduct, it must publish the rule in advance and give citizens a fair chance to comply. That is not radical. That is what law actually means.

The third requirement is that criminal penalties should require actual criminal intent, what the law calls mens rea, not merely an accidental slip through a regulatory threshold. Overcriminalization is not a side issue; it is the point at which law stops protecting liberty and starts manufacturing subjects.

The fourth requirement is that judges must return to originalism and textualism. The Constitution and statutes mean what their words meant when enacted. The judge's job is not to find the best outcome or to defer to the bureaucrat's changing interpretation. It is to apply the written rule. Justice Antonin Scalia liked to say that the rule of law is a law of rules. Not a law of predictions, not a law of prosecutorial moods, not a law of guidance issued after the fact. Rules.

The final requirement is that the same law must apply to the powerful and the powerless. That means no special immunity for the administrative class, no selective prosecution for political reasons, and no separate standard for the rulers and the ruled. It is the oldest and most radical promise of the American republic, and it is the one most often broken by the people who invoke the phrase.

The Stakes

The rule of law is not a technical concern for lawyers. It is the difference between a citizen and a subject. A citizen lives under laws he can know, understand, and obey. A subject lives under the changing will of officials he cannot predict and cannot hold to account.

The Framers understood this. That is why they built a constitutional republic, not a pure democracy, so that even a majority could not simply vote away the rights of the minority, and so that government would be bound by fixed law rather than transient passion. That is why John Adams called for a government of laws and not of men. That is why the Constitution separates powers, enumerates powers, and protects individual rights.

We do not need a new theory. We need the old one. We need to stop using rule of law as a slogan and start restoring the conditions that make it real: laws that are known in advance, rules that apply equally, and judges who enforce what the text says.

Anything less is not the rule of law. It is the rule of discretion. And discretion, in the hands of the state, is another name for arbitrary power.