Legal Concepts on ExcellentWiki - Legal Encyclopedia

Proportionality and Reasonableness in Brazilian Law

Tue, 07 Jul 2026 00:00:00 +0000

Introduction

Proportionality (proporcionalidade) and reasonableness (razoabilidade) are fundamental principles of Brazilian constitutional law, used extensively by the Supreme Federal Court (STF) to adjudicate conflicts between fundamental rights. Drawing on German constitutional theory — particularly the work of Robert Alexy — Brazil has developed a sophisticated proportionality framework that structures judicial analysis of restrictions on fundamental rights.

Theoretical Foundations

Reception of German Doctrine

Brazilian proportionality analysis is heavily influenced by the German Federal Constitutional Court’s jurisprudence and Alexy’s principles theory (Principientheorie). Under this theory:

Separation of Powers Under the 1988 Constitution

Tue, 07 Jul 2026 00:00:00 +0000

Introduction

The separation of powers (separação dos poderes or tripartição dos poderes) is a fundamental principle of the 1988 Federal Constitution. Article 2 provides that the Legislative, Executive, and Judiciary are independent and harmonious branches of government. Brazilian constitutional law adopts the Montesquieuan tripartite model while incorporating modern mechanisms of checks and balances (freios e contrapesos) that allow each branch to exercise limited control over the others.

Constitutional Framework

Article 2

The principle is formally established in Article 2 of the Constitution: “The Legislative, Executive, and Judiciary are independent and harmonious branches of the Union.”

Rule of Law and Democratic State Under the 1988 Constitution

Tue, 07 Jul 2026 00:00:00 +0000

Introduction

The rule of law (Estado de Direito) and the democratic state (Estado Democrático) are foundational concepts of the 1988 Federal Constitution. Article 1 establishes the Democratic State of Law (Estado Democrático de Direito) as the fundamental principle of the Brazilian constitutional order. This concept synthesizes the classical rule of law — with its requirements of legality, legal certainty, and protection against arbitrary power — with the democratic principle of popular sovereignty and the social commitment to fundamental rights.

Judicial Review in Brazil

Tue, 07 Jul 2026 00:00:00 +0000

Introduction

Judicial review (controle de constitucionalidade) in Brazil is a sophisticated system combining two models: abstract review (controle abstrato or concentrado), modeled on the European Kelsenian model, and concrete review (controle concreto or difuso), modeled on the American system. The Supreme Federal Court (STF) plays the central role in constitutional review, though all Brazilian courts exercise some form of constitutional adjudication.

Historical Development

The 1891 Constitution

The Republic Constitution of 1891 introduced diffuse review modeled on the US system (Marbury v. Madison), allowing any court to declare legislation unconstitutional in specific cases. This system operated throughout the 20th century.

Fundamental Rights in Brazilian Law

Tue, 07 Jul 2026 00:00:00 +0000

Introduction

Fundamental rights (direitos fundamentais) are the cornerstone of the 1988 Federal Constitution, which contains one of the most comprehensive catalogs of rights in comparative constitutional law. Title II (Articles 5-17) enumerates individual, collective, social, and political rights, while other constitutional provisions establish economic, cultural, and environmental rights. The 1988 Constitution emerged from the struggle against the military dictatorship and reflects a profound commitment to human dignity, equality, and social justice.

Social Function of Property and Contracts in Brazilian Law

Tue, 07 Jul 2026 00:00:00 +0000

Introduction

The social function (função social) of property and contracts is a transformative principle of Brazilian law, introduced by the 1988 Federal Constitution and developed by the Civil Code of 2002. This principle rejects the individualistic, absolute conception of property rights and contractual freedom, requiring that these institutions serve broader social purposes. The social function principle has profoundly influenced property law, contract law, agrarian law, and urban regulation.

Constitutional Foundations

Property

Article 5, XXII of the Constitution guarantees the right to property, while Article 5, XXIII establishes that property shall fulfill its social function. Article 170, III recognizes the social function of property as a principle of the economic order. Article 184 provides for expropriation of rural property that fails to fulfill its social function, and Article 182 applies similar principles to urban property.

Human Dignity as a Constitutional Foundation

Tue, 07 Jul 2026 00:00:00 +0000

Introduction

Human dignity (dignidade da pessoa humana) is the foundational principle of the 1988 Federal Constitution. Article 1, III establishes it as one of the fundamental foundations of the Brazilian state, alongside sovereignty, citizenship, social values of labor, and political pluralism. As a supraconstitutional value and interpretive principle, human dignity permeates the entire legal system, informing the interpretation of fundamental rights, the limits of state power, and the goals of public policy.

Legal Certainty and Legitimate Expectations in Brazilian Law

Tue, 07 Jul 2026 00:00:00 +0000

Introduction

Legal certainty (segurança jurídica) is a fundamental principle of Brazilian constitutional law, recognized as an implicit foundation of the Democratic State of Law. It encompasses the stability, predictability, and reliability of the legal system, ensuring that individuals can order their affairs based on clear and stable legal norms. The principle has been developed by the STF, particularly in cases involving changes in constitutional interpretation, tax legislation, and administrative acts.