How Brazil's Supreme Court Works—and Why It Matters
Brazil's Supreme Federal Court (STF) is one of the world's most powerful and controversial constitutional courts. Here's how its 11 justices are chosen, what powers they wield, and why the court has become a lightning rod in Brazilian democracy.
Guardian of Latin America's Largest Democracy
Brazil's Supreme Federal Court — the Supremo Tribunal Federal, or STF — is the final arbiter of constitutional disputes in the world's fourth-largest democracy. With just 11 justices, the court shapes policy on everything from indigenous land rights to social media regulation, and its rulings cannot be appealed. In recent years, the STF has emerged as one of the most politically influential courts on the planet, drawing both praise for defending democracy and criticism for overstepping its mandate.
How Justices Are Chosen
The appointment process resembles the American model on which it was originally based. The president nominates a candidate, who must then be confirmed by an absolute majority of the Federal Senate — at least 41 of 81 senators. Before the vote, the Senate conducts a public hearing called a sabatina, in which senators question the nominee. The vote itself is held by secret ballot.
Candidates must be native-born Brazilian citizens between 35 and 65 years old, possess "renowned legal knowledge," and have an "impeccable reputation." Unlike their U.S. counterparts, STF justices do not serve for life. They must retire at the mandatory age of 75, a threshold raised from 70 by a 2015 constitutional amendment.
Senate rejections are extraordinarily rare. Before the rejection of President Lula's nominee in April 2026 — the first in 132 years — the last refusal came in 1894, when Brazil's second-ever president clashed with lawmakers.
Structure and Jurisdiction
The STF comprises 11 justices organized into two chambers and a full plenary session. The court's president and vice president are elected by fellow justices for two-year terms, typically following a seniority-based rotation tradition rather than a formal rule.
Under Brazil's 1988 Constitution, the court's primary mission is to "safeguard the Constitution." Its jurisdiction is vast. The STF rules on the constitutionality of laws, tries senior officials — including the president — for criminal offenses, and handles extradition requests. A 2004 reform gave the court the power to issue binding precedents (súmulas vinculantes), which all lower courts and government agencies must follow, requiring approval by at least eight of the 11 justices.
The court also handles a staggering caseload. Unlike the U.S. Supreme Court, which hears roughly 70 cases a year, the STF receives tens of thousands of new cases annually and issues a roughly equal number of decisions, according to SCOTUSblog.
The Power of Individual Justices
One distinctive — and controversial — feature of the STF is the outsized power of individual justices. Any single justice can issue emergency injunctions in high-profile cases, effectively making momentous legal decisions alone. This has led scholars to describe a shift from collegiality to individualized judicial power.
Justice Alexandre de Moraes, for instance, became a polarizing figure after unilaterally opening investigations into disinformation campaigns and ordering the suspension of social media platform X in 2024. Supporters called his actions essential to defending democracy against the January 2023 insurrection attempt; critics accused him of acting simultaneously as victim, prosecutor, and judge.
Why the Court Keeps Growing in Influence
Political scientists point to a pattern common in fragmented democracies: when legislatures cannot resolve disputes, courts fill the vacuum. Brazil's Congress, splintered among more than 20 parties, frequently deadlocks on contentious issues. The STF steps in — ruling on topics from indigenous land claims to platform liability — because "Brazilian politics stopped deciding," as constitutional law scholars have observed.
This dynamic creates what analysts call a paradox: the STF is necessary to prevent democratic collapse yet structurally incapable of sustaining democracy on its own. The real challenge, experts argue, is rebuilding a political system capable of deciding, deliberating, and assuming responsibility — so the court can return to its intended role as a constitutional guardian rather than a substitute legislature.
