How the US Supreme Court Decides Its Cases — a Step-by-Step Guide
Why Read This
What Makes This Article Worth Your Time
Summary
What This Article Is About
Legal scholar Paul M. Collins Jr. demystifies the step-by-step process by which the US Supreme Court selects, argues, and decides its cases. The court is a reactive institution — it cannot act until a case is brought before it. The process begins when a losing party files a writ of certiorari, a formal petition requesting review. Out of roughly 4,000 petitions received each term, the court accepts fewer than 80 — an acceptance rate of about 2% — using the rule of four, which requires at least four justices to agree before a case is granted review.
Once a case is accepted, parties file legal briefs and deliver oral arguments, after which the justices meet in a private conference to cast preliminary votes. The most senior justice in the majority assigns the task of drafting the majority opinion, which is then revised through rounds of negotiation among justices. Additional concurring and dissenting opinions may be written before the final ruling is publicly announced — a process Collins notes can span months and involves considerable behind-the-scenes deliberation and compromise before any headline-making decision reaches the public.
Key Points
Main Takeaways
The Court Cannot Initiate Cases
As a reactive institution, the Supreme Court must wait for individuals, businesses, or governments to bring cases before it — it has no power to select issues on its own initiative.
Only 2% of Cases Accepted
The court receives around 4,000 petitions per term but hears fewer than 80. Law clerks play a crucial gatekeeping role, writing memos that guide justices on which petitions deserve review.
Amicus Briefs Signal Importance
Interest groups and outside parties file amicus curiae (“friend of the court”) briefs to influence both the decision to hear a case and its eventual outcome — averaging 16 per case in recent terms.
Opinions Are Negotiated, Not Handed Down
Majority opinions go through multiple rounds of revision as justices bargain over language and reasoning — and a justice initially in the majority can defect to the minority if unsatisfied.
The Chief Justice Controls Assignments
When the Chief Justice is in the majority, they decide who writes the majority opinion — a strategically powerful role that can shape the scope and reasoning of a landmark ruling.
Reading a Dissent Signals Deep Disagreement
On rare occasions, dissenting justices read their opinions aloud from the bench — a public signal of profound objection, as Justice Sotomayor did in the 2023 affirmative action ruling.
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Article Analysis
Breaking Down the Elements
Main Idea
Supreme Court Rulings Are the End Product of a Long Hidden Process
The article’s central message is that the landmark decisions that dominate June headlines are not sudden judicial pronouncements — they are the product of months of structured, largely private procedural steps. Understanding this process, Collins argues, is essential for citizens to appreciate both how the court functions as a policymaking institution and why its decisions carry the weight they do.
Purpose
To Educate and Demystify for a General Audience
Collins writes as a scholar making expert knowledge accessible. His explicit purpose, stated in the introduction, is to help the public understand how the highest court “actually makes policy” — using a step-by-step expository structure timed to the June ruling season when public attention is highest. The article aims to replace vague assumptions about judicial power with a concrete understanding of procedure.
Structure
Chronological Process Walkthrough → Concrete Examples → Significance Conclusion
The article follows the exact chronological sequence of the court’s own process: agenda-setting → briefing → oral arguments → conference → opinion drafting → public announcement. Each stage is explained with relevant facts and statistics before moving to the next. The article closes by stepping back from procedure to draw out its civic significance — reminding readers why understanding this process matters for a democracy.
Tone
Authoritative, Neutral & Accessible
Collins writes with the calm authority of a subject-matter expert explaining a complex institution to non-specialists. The tone is deliberately neutral and non-partisan — focused entirely on procedure rather than the merits of any specific ruling. It is informative without being dry, using specific statistics (4,000 petitions, 2% acceptance rate, 148 amicus briefs in Obergefell) and a real example (Sotomayor’s 2023 dissent) to make abstract procedural points concrete and memorable.
Key Terms
Vocabulary from the Article
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Tough Words
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A formal legal document filed by a losing party in a lower court, asking the Supreme Court to review the case — from Latin meaning “to be informed.” If granted, the court agrees to hear the appeal.
“The party who loses in a lower court files a writ of certiorari to the Supreme Court.”
Latin for “friend of the court” — a brief filed by parties not directly involved in a case who wish to offer information, arguments, or perspectives they believe will help the court reach a decision.
“Sometimes, interest groups weigh in by filing amicus curiae, or ‘friend of the court’ briefs.”
The formal name for the Supreme Court’s discretionary process of agreeing to review a lower court decision; when the court “grants certiorari,” it has chosen to take on the case.
“Following the conference, the court releases its list of cases granted and denied certiorari, known as the orders of the court.”
A separate written opinion by a justice who agrees with the majority’s final decision but wishes to express a different or additional legal reasoning for arriving at the same conclusion.
“Concurring opinions are written by justices in the majority and are often used to highlight a different legal basis for the court’s decision.”
A written opinion by one or more justices in the minority who disagree with both the outcome of a case and the majority’s legal reasoning — sometimes read aloud from the bench as a signal of deep objection.
“Dissenting opinions are written by justices who are in the minority and disagree with the outcome of the case and the majority’s reasoning.”
Of great importance or significance, especially in terms of the effects or results that follow — used here to describe Supreme Court decisions that have wide-reaching impact on law, policy, and everyday life.
“Each June, the nation turns its attention to the U.S. Supreme Court as it hands down some of its most consequential decisions.”
Reading Comprehension
Test Your Understanding
5 questions covering different RC question types
1According to the article, if the Chief Justice is in the minority after the post-argument conference, the Chief Justice still retains the power to assign who writes the majority opinion.
2According to the article, what is the primary function of amicus curiae briefs at the merits stage — after a case has already been accepted for review?
3Which sentence best explains why a justice might choose to read their dissenting opinion aloud from the bench, according to the article?
4Evaluate each statement about the Supreme Court process described in this article.
The rule of four means that at least four of the nine Supreme Court justices must agree to grant certiorari before a case is accepted for review.
Justices are permitted to change their votes after the post-argument conference, and the article confirms that they occasionally do so before the final opinion is announced.
According to the article, oral arguments are divided equally between the petitioner, respondent, and amicus groups, giving each an equal share of the allotted hour.
Select True or False for all three statements, then click “Check Answers”
5The article notes that the Supreme Court receives about 4,000 petitions per term but decides fewer than 80 cases, and that law clerks write memos recommending which petitions to grant or deny. What can we most reasonably infer about the role of law clerks in the court’s work?
FAQ
Frequently Asked Questions
A writ of certiorari is a formal legal document filed by the party who lost in a lower court, asking the Supreme Court to review their case. The document outlines why the court should take up the matter — typically arguing that the lower court made a legal error. The opposing party (the lower court winner) can respond by filing a brief in opposition, arguing that the lower court was correct. The Supreme Court then decides whether to grant or deny the petition.
The rule of four is the Supreme Court’s internal threshold for accepting a case: at least four of the nine justices must vote in favour of granting certiorari before a case proceeds to full review. This is notable because it is a lower bar than a simple majority — meaning a minority of justices can force the full court to hear a case. It ensures that important legal questions supported by a substantial minority are not silently dismissed, and it gives each justice meaningful power in the agenda-setting process.
After the post-argument conference, the Chief Justice (if in the majority) assigns one justice to draft the majority opinion. That draft then circulates among the justices, who offer written feedback and negotiate over its content and reasoning. A justice initially in the majority can defect to the minority if unhappy with the draft’s direction — meaning the coalition can shift and the outcome can change before the opinion is formally announced. Justices retain the right to change their votes all the way up to the moment of public release.
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This article is rated Beginner. While it introduces several Latin legal terms such as “writ of certiorari” and “amicus curiae,” the author defines each one clearly as it is introduced. The writing follows a straightforward chronological structure with no complex argumentation or abstract reasoning required. A reader with no prior legal knowledge can follow the article comfortably, making it an ideal introduction to how the US Supreme Court functions.
Paul M. Collins Jr. is a legal scholar who specialises in the US Supreme Court. The article is published in The Conversation, a media platform that exclusively publishes articles written by academic researchers and experts for a general audience. Collins brings academic authority to a topic that is frequently misunderstood by the public — particularly around June, when the court’s most consequential decisions are announced and media coverage intensifies without always explaining how those decisions were reached.
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