There is a legal principle that modern courts work very hard to avoid. It is not obscure. It is not controversial in the abstract. Every judge in America will tell you they believe it. The moment it gets applied to a law they want to preserve, it disappears from their opinions as if it never existed.
The principle is void ab initio. It means void from the beginning. And the Supreme Court stated it plainly in 1886 in Norton v. Shelby County: an unconstitutional act is not a law; it confers no rights; it imposes no duties; it affords no protection; it creates no office; it is, in legal contemplation, as inoperative as though it had never been passed.
Read that again. Not voidable. Not presumptively invalid. Not valid until struck down. As inoperative as though it had never been passed. That is the doctrine. And it changes everything about how unconstitutional laws are supposed to work.
The Difference Between Void and Voidable
Modern constitutional law operates almost entirely on a voidable model. Under that model, a law remains valid and enforceable until a court decides to strike it down. Until that moment, officials can arrest people under it, prosecute people under it, and imprison people under it. The constitutional defect is treated as something that needs to be discovered and declared by a court before it has any legal consequence. Norton says that is wrong.
The void ab initio doctrine rests on a simple logical premise: if the Constitution is genuinely higher law, and if a statute contradicts it, then the statute never had valid legal existence. A court that later declares the statute unconstitutional is not destroying something that previously had legal force. It is recognizing a fact that was true from the beginning. The constitutional defect existed the moment the law was signed. The court role is to acknowledge reality, not to create it.
The Relationship to Article VI
The void ab initio doctrine is not a separate theory. It is the operational consequence of Article VI Supremacy Clause. Article VI says only laws made in Pursuance of the Constitution are supreme law. That clause is a gate. A statute that contradicts the Constitution never passes through the gate. It never achieves the status of supreme law. It never had the right to rule. The court declaration of unconstitutionality is not the event that strips the law of its validity. The constitutional contradiction is the event. The court declaration merely recognizes what was already true.
Marbury v. Madison stated the principle in 1803: a law repugnant to the Constitution is void. Norton sharpened it in 1886 by making explicit what void actually means. Together, they establish a complete framework. A law that contradicts the Constitution never achieves supremacy under Article VI. Because it never achieved supremacy, it is as inoperative as if it had never been passed. Everything built on it, including prosecutions, disabilities, and administrative denials, is built on nothing.
What the Doctrine Requires
Void ab initio is not a gentle doctrine. It does not ask courts to balance, to weigh interests, or to consider whether the government had good intentions. It asks a single question: does this law pass through the Article VI gate? If the Second Amendment is a negative command and the law contradicts that command, the answer is no. The law is void. It was void the day Congress passed it. It remains void today. Every prosecution under it has rested on a legal nullity. Every disability imposed through it has rested on a foundation that, in the words of Norton, never existed. The doctrine has not changed. An unconstitutional act is not a law. It confers no rights, imposes no duties, and affords no protection. It is as inoperative as though it had never been passed. That is Norton v. Shelby County. It is binding precedent. It is still on the books. And it is the answer to every government argument that begins with the word longstanding.