
The Fourth Amendment to the United States Constitution was introduced in 1789 and ratified in 1791. It is part of the Bill of Rights, which comprises the first 10 amendments to the Constitution. The Fourth Amendment deals with three central issues: what constitutes a search and seizure, what constitutes probable cause for these actions, and how violations of Fourth Amendment rights should be addressed. The amendment protects the right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures.
| Characteristics | Values |
|---|---|
| Year the 4th Amendment was added to the US Constitution | 1791 |
| Date the 4th Amendment was passed by Congress | 25 September 1789 |
| Date the 4th Amendment was ratified | 15 December 1791 |
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What You'll Learn

The Fourth Amendment was passed by Congress on September 25, 1789
The Fourth Amendment to the United States Constitution was passed by Congress on September 25, 1789. It was introduced in response to the principle that "every man's house is his castle" and that citizens accused of crimes should be provided with protections. The amendment was designed to protect people's rights to privacy and security in their homes and possessions.
The Fourth Amendment states that people have the right to be secure in their persons, houses, papers, and effects, and that these shall not be subject to unreasonable searches and seizures. It also outlines that warrants should only be issued with probable cause and should be supported by an oath or affirmation, with specific details about the place to be searched and the persons or things to be seized.
The amendment was proposed by James Madison, who initially suggested twenty amendments based on state bills of rights and English sources such as the Bill of Rights of 1689. Congress reduced these to twelve amendments, with modifications to the language about searches and seizures. The final language was submitted for ratification on the same day the amendment was passed by Congress.
The Fourth Amendment has been central to debates about the balance between the rights of persons and the responsibilities of law enforcement officials. It has also been the subject of interpretation and expansion by the Supreme Court, which has had to define what constitutes an "unreasonable" search and seizure and how to address violations of Fourth Amendment rights.
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It was ratified on December 15, 1791
The Fourth Amendment to the United States Constitution was ratified on December 15, 1791, along with nine other amendments, to form the Bill of Rights. The Fourth Amendment was introduced in 1789, and its ratification was a response to the colonial experience of the use of ''writs of assistance' and 'general warrants' by British officers to search homes without restraint.
The Fourth Amendment was added to the Constitution to protect the rights of the people to be secure in their persons, houses, papers, and property against unreasonable searches and seizures. It also protects against the violation of privacy and requires probable cause for any search or seizure. The amendment was based on the principle that "every man's house is his castle" and that citizens accused of crimes should be provided with protections.
The Fourth Amendment has been interpreted and enforced through case law, with the Supreme Court playing a significant role in defining the protections it affords. Early court decisions limited the amendment's scope to physical intrusions of property or persons. However, in Katz v. United States (1967), the Supreme Court held that the Fourth Amendment's protections extend beyond physical locations to include intrusions on the privacy of individuals.
The Fourth Amendment is a crucial part of the Constitution, serving as the foundation of criminal law jurisprudence and balancing the rights of persons with the responsibilities of law enforcement officials. The amendment has undergone considerable public, political, and judicial debate, particularly regarding the interpretation of ''unreasonable'' searches and seizures and the independence or interdependence of its two clauses.
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It protects citizens from unreasonable searches and seizures
The Fourth Amendment to the United States Constitution was ratified in 1791 as part of the Bill of Rights. This amendment protects the right of the people to be secure in their persons, houses, papers, and effects against unreasonable searches and seizures. It is a fundamental part of American civil liberties and plays a crucial role in defining the relationship between citizens and their government.
The amendment specifically states that "The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no Warrants shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized." This complex sentence can be broken down into two main clauses: the first protects against unreasonable searches and seizures, while the second establishes the requirements for obtaining a warrant.
Unreasonable searches and seizures are those that are conducted without probable cause or a properly obtained warrant. This means that law enforcement officers cannot simply decide to search your home or seize your property on a whim; they must have a valid reason to suspect that you have committed a crime and must obtain a warrant from a neutral judge or magistrate. The amendment also protects against overly broad searches by requiring that warrants specifically describe the place to be searched and the items to be seized.
The protection against unreasonable searches and seizures extends beyond our homes and personal property. It also covers our electronic communications and data. In the digital age, this aspect of the Fourth Amendment has become increasingly important, as it safeguards our privacy and prevents the government from conducting indiscriminate surveillance or accessing our personal information without just cause.
The exclusionary rule is a legal principle that further strengthens the Fourth Amendment. This rule states that evidence obtained through an illegal search or seizure is generally inadmissible in court. This means that if the police violate your Fourth Amendment rights during the investigation of a crime, any evidence they gather as a result of that violation cannot be used against you in a criminal prosecution.
In conclusion, the Fourth Amendment's protection against unreasonable searches and seizures is a cornerstone of our constitutional rights. It ensures that our privacy and security are safeguarded from arbitrary governmental intrusion. Through the warrant requirement and the exclusionary rule, the amendment strikes a balance between the needs of law enforcement and the civil liberties of citizens, ensuring that any intrusion on our privacy is reasonable and justified.
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It requires probable cause for government searches
The Fourth Amendment to the United States Constitution was passed by Congress on September 25, 1789, and ratified on December 15, 1791. It requires probable cause for government searches and seizures, protecting the people's right to privacy and freedom from unreasonable intrusions. This means that police cannot search a person without a warrant or probable cause.
The Fourth Amendment states that "the right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no warrants shall issue but upon probable cause, supported by oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized."
The concept of "probable cause" is central to the warrant clause, but neither the Fourth Amendment nor federal law defines it. Instead, it is a judicial construct determined by the facts and practical considerations of each case. For example, in United States v. Jacobsen, the court summarised that a "search" under the Fourth Amendment occurs when an expectation of privacy that society considers reasonable is infringed. Similarly, a "seizure of property" occurs when there is meaningful interference with an individual's possessory interests in that property.
The Fourth Amendment also allows for certain exceptions to the warrant requirement. For instance, a warrantless search may be lawful if an officer has consent to search, if the search is incident to a lawful arrest, or if there is probable cause with exigent circumstances.
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It was influenced by the Massachusetts Declaration of Rights
The Fourth Amendment to the United States Constitution was passed by Congress on September 25, 1789, and ratified on December 15, 1791. It is part of the Bill of Rights, which comprises the first ten amendments to the Constitution. The Fourth Amendment was influenced by the Massachusetts Declaration of Rights, specifically its Article XIV, written by John Adams and enacted in 1780 as part of the Massachusetts Constitution.
Article XIV of the Massachusetts Declaration of Rights added the requirement that all searches must be "reasonable". This article served as a basis for the language of the Fourth Amendment, which guarantees the right of the people to be secure in their persons, houses, papers, and effects against unreasonable searches and seizures. The amendment specifies that no warrants shall be issued without probable cause, supported by oath or affirmation, and that warrants must particularly describe the place to be searched and the persons or things to be seized.
The inclusion of this amendment was influenced by the sentiment that the Constitution lacked adequate guarantees for civil liberties and individual rights. Supporters of the Constitution in states like Massachusetts proposed that their state conventions ratify the Constitution and call for the addition of a bill of rights. This resulted in James Madison proposing twenty constitutional amendments, including an amendment requiring probable cause for government searches, which was influenced by the Massachusetts Declaration of Rights.
The Massachusetts Declaration of Rights reflects the belief in the right of self-governance and the desire to protect individual liberties. It influenced the Fourth Amendment's focus on restricting government power and protecting the privacy and security of individuals from unreasonable searches and seizures. This amendment has been central to defining the limits of government power and safeguarding the rights of citizens in the United States.
The Fourth Amendment case law addresses three main issues: what constitutes a "search" and a "seizure", what constitutes probable cause for these actions, and how to address violations of Fourth Amendment rights. The amendment's scope has been interpreted and expanded over time through court rulings, such as Katz v. United States (1967), which extended its protections beyond physical locations to include intrusions on the privacy of individuals.
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Frequently asked questions
The 4th Amendment was added to the Constitution in 1791.
The 4th Amendment was proposed on September 25, 1789.
Congress proposed 12 amendments to the Constitution in 1789.
Ten of the 12 proposed amendments were ratified by three-fourths of the state legislatures.
The amendments were ratified on December 15, 1791.

























