What the Dobbs decision actually decided, step by step and in plain English

Dobbs is the most shouted-about opinion in a generation, and it may be the least read. One person says the Court banned abortion. It did not. Another says the Court said nothing about the question. It said a great deal. A third says the decision was a surprise sprung from nowhere. Mississippi had asked for exactly this, in writing, in its brief. The decision is public and it is long, and a fair number of the people who have been shouting about it on television since the day it came out have not read it.

So let me do the reader's work for you. This is a walk through the case in the order the Court took it, in plain English, with the dates, the vote count that confuses everybody, the legal test the majority used, and the list of things the opinion expressly left alone. It is an explainer, so the argument here is the one the justices made, and where I give my own judgment I will say so.

Step one: the Mississippi law

The case starts with a statute. In 2018 Mississippi passed the Gestational Age Act, which prohibited abortion after fifteen weeks of gestation, with exceptions for a medical emergency and for a severe fetal abnormality. That is what the statute says; I am describing its text, not making a medical judgment. Mississippi at the time had one abortion clinic, Jackson Women's Health Organization, and the clinic sued the state's health officer, Dr. Thomas Dobbs, to block the law.

Under the Supreme Court's existing precedents, Roe v. Wade (1973) and Planned Parenthood v. Casey (1992), a state could not ban abortion before viability, the point at which a child can survive outside the womb. Fifteen weeks is before viability. So the lower federal courts, applying those precedents, blocked the law. The district court did so in 2018, and the Fifth Circuit upheld that result.

Mississippi then asked the Supreme Court to take the case. Its petition asked whether all pre-viability prohibitions on elective abortions are unconstitutional, and the Court agreed to hear that question in May 2021. Once the case was set for argument, Mississippi's brief said openly that Roe and Casey were wrong and should be overruled.

Step two: argument, a leak and a decision

The Court heard arguments on December 1, 2021. In May 2022 a draft of the majority opinion was leaked to the press and published. The leak became its own story, and the Court said it was investigating. The final opinion came down on June 24, 2022.

Justice Samuel Alito wrote the majority opinion. Justices Thomas, Gorsuch, Kavanaugh and Barrett joined it in full. Chief Justice Roberts wrote separately, and Justices Breyer, Sotomayor and Kagan wrote a joint dissent.

Step three: the vote that confuses everybody

You will hear Dobbs described as a 6-3 decision and as a 5-4 decision. Both are correct. They answer different questions, and the difference is the key to understanding what happened.

Six justices voted to uphold the Mississippi law, which is the judgment. Five of the six wanted to do it by overruling Roe and Casey. Chief Justice Roberts agreed with the judgment and would have upheld the fifteen-week law, but he did not want to overrule the precedents. He wrote that the Court should decide only what it needs to decide, and that it could have upheld Mississippi's law by rejecting the viability line, a narrower step. In his view, overruling Roe in full was a serious jolt to the legal system that the case did not require.

So the arithmetic is: 6 votes to uphold the law, 5 votes for the opinion that overruled the precedents. If someone tells you only the Chief Justice stood between the country and total overruling, you now know that is not accurate. The five were already there.

Step four: the question the Court asked

Here is the heart of the majority's approach, and it is a legal test, not a moral one. The majority asked a single question: does the Constitution protect a right to obtain an abortion?

The Constitution does not mention abortion. The Fourteenth Amendment says no state shall deprive any person of life, liberty or property without due process of law. Roe had read the word "liberty" to include a right to abortion. So the question became how a court decides whether an unlisted right counts as part of "liberty."

The majority turned to Washington v. Glucksberg, a 1997 case about assisted suicide. Under Glucksberg, a right that is not written in the Constitution is protected by the Due Process Clause only if it is deeply rooted in the nation's history and tradition and implicit in the concept of ordered liberty. The test is meant to keep judges from simply enacting their own preferences under the name of liberty.

Applying it, the majority looked at the history. It concluded that no such right had been recognized in American law until the late twentieth century. It pointed out that at the time the Fourteenth Amendment was ratified in 1868, a large majority of the states made abortion a crime, and that the common law, the legal tradition inherited from England, also treated abortion as wrongful, at least once the pregnancy had advanced. So the majority held that the right to abortion is not deeply rooted in history and tradition. It also distinguished abortion from the other privacy-related cases like contraception and marriage by saying that abortion involves what the Court called the life of an "unborn human being," which makes it different in kind.

The dissent disagreed sharply. It argued that the Fourteenth Amendment's guarantee of liberty has always been read to protect individual autonomy in important personal decisions, that history-only tests would have blocked rights the Court has long recognized, and that the majority's approach left the status of other precedents uncertain. The disagreement here is real, and it is the same disagreement that divides originalists from advocates of a living Constitution. For those two schools, see Originalism Explained for People Who Skipped Law School and The Living Constitution Sounds Reasonable Until You Ask Who Gets to Update It.

Step five: stare decisis, the rule about old decisions

The next question is a fair one. Even if Roe was wrong, courts do not overrule precedent every time they disagree. The doctrine of stare decisis, Latin for standing by things decided, says that old decisions carry weight. So the majority had to explain why this one should go.

It used a set of factors that the Court has applied in other overruling cases. In Dobbs, the majority described five:

1. The nature of the error. The majority said Roe was egregiously wrong from the start, because the Constitution does not mention abortion and no earlier case had held anything like it.
2. The quality of the reasoning. The majority said the reasoning was exceptionally weak, that the opinion did not ground the right in text or tradition, and that it invented a framework resembling a legislative scheme. Readers of The pro-choice scholars who called Roe bad law long before Dobbs will recognize this complaint, since scholars on both sides of the policy debate had made versions of it for decades.
3. Workability. The majority said that the standards the Court had used, first the trimester framework and then Casey's undue-burden test, had proved hard for lower courts to apply and had produced inconsistent results.
4. Effect on other areas of law. The majority said Roe and Casey had distorted other doctrines, for example in the law of standing and in the rules for challenging statutes in court.
5. Reliance. The majority said that the sort of reliance that counts is concrete, such as in property and contract rights, where people have made plans on the basis of a stable rule. It concluded that abortion did not involve that kind of reliance. The dissent and many others disagreed, saying that people had organized their lives, careers and families around the availability of abortion for nearly fifty years.

You are free to decide which side wins on each factor. What matters for this explainer is that the Court's reasoning was a structured answer to the question "why overrule," not a bare announcement.

Step six: rational basis, the standard that now applies

Once the Court decided there is no constitutional right to abortion, it had to say how courts should review abortion laws from now on. The answer is the most ordinary standard in constitutional law. When a law does not burden a recognized fundamental right or a protected class, a court asks only whether it is rationally related to a legitimate government interest. That is called rational basis review, and laws that meet it carry a strong presumption of validity.

The majority listed some of the legitimate interests a state might have: respect for and preservation of prenatal life at all stages of development, protection of maternal health and safety, preservation of the integrity of the medical profession, the mitigation of fetal pain, and the prevention of discrimination on the basis of race, sex or disability. Whether a particular state's law meets that standard is a question for the courts in that state, but the bar is low by design.

The practical meaning is that a state's abortion policy is now set by its voters and legislature, within the limits of its own constitution. The Court put it in its closing lines: the issue returns to the people's elected representatives. That is why abortion law now differs so much from one state to the next, which why abortion law differs from state to state, mechanism by mechanism explains mechanism by mechanism.

Step seven: what the opinion said it did not reach

This part gets lost in the shouting, so read it slowly. The majority took pains to limit what it was deciding.

• Other precedents. The majority said its reasoning about abortion should not be understood to cast doubt on precedents that do not concern abortion, and it distinguished abortion because of what it described as the unique involvement of prenatal life. Justice Thomas, in a separate concurrence, wrote that the Court should reconsider other substantive due process decisions, such as those on contraception, but no other justice joined that part. Justice Kavanaugh, in his concurrence, wrote that the decision does not threaten or cast doubt on cases like Griswold, which concerned contraception.
• Travel between states. Justice Kavanaugh also wrote that, in his view, a state may not bar its residents from traveling to another state to obtain an abortion, based on the constitutional right to interstate travel. That is a concurrence and not the opinion of the Court, and the question was not before the Court.
• Federal law. The opinion did not decide how federal statutes would interact with state abortion laws, or whether Congress could legislate on the subject. Those questions were not in the case.
• What any state should do. The opinion did not say that states must ban abortion, or where to draw lines, or what exceptions to allow. Strictly speaking it did not endorse any particular law. It said the Constitution does not answer the question and left it to the political process.

That last point is the one I find most useful for readers who want to act. A court ruling that says "this is your decision" puts the decision on you.

What it means for your family

Stripped of the legal vocabulary, Dobbs changed who makes the call. Before it, a federal constitutional rule limited what every state could do before viability. After it, the rules differ by state, and they can change when a legislature meets, a ballot measure passes or a state court interprets its own constitution. If you live in one state and have relatives in another, they may live under quite different rules.

That puts a premium on knowing the actual law where you live. The state legislature's website publishes the statutes, and your attorney general's office or health department can tell you where to look. It also puts a premium on how you vote and who you send to your statehouse, because that is where these laws are written now. Whether you applaud or lament the result, it is a more democratic arrangement than the one before it, in the sense that the people who live under the rules can change them.

For the pro-life side, there is a lesson in persuasion. A decision that returns a question to the voters does not settle it. It starts the argument. If you want ammunition for that conversation, the pro-life argument in four premises and where each one gets attacked sets out the case and its strongest objections, twelve pro-life dinner-table questions and honest answers handles the questions you will get, and The Hyde Amendment rider and the conscience laws that keep taxpayers out covers the money. For help reading the document itself, How to Read a Supreme Court Opinion Without a Law Degree is a short guide.

The bottom line

• Dobbs (June 24, 2022) held that the Constitution does not confer a right to abortion and overruled Roe and Casey, returning the question to elected representatives. It did not ban abortion anywhere.
• The vote was 6-3 to uphold Mississippi's fifteen-week law and 5-4 to overrule Roe and Casey. The Chief Justice agreed with the judgment but not the overruling.
• The majority used the Glucksberg history-and-tradition test, applied the five stare decisis factors, and set rational basis review as the standard going forward.
• The opinion expressly left alone other precedents, and it did not decide questions such as interstate travel or federal law, though individual justices wrote about them.
• The practical step is local. Read your own state's law on the legislature's website, and pay attention to your statehouse, because that is where the decision now lives.