The Online Library of Liberty

A project of Liberty Fund, Inc.

• About the Author
• Preface
• Part 1: The Constitution’s Deep Roots
• Points to Remember
• The Meaning of Constitutional Government
• The Lamp of Experience
• The Constitutions of Antiquity
• English Origins of America’s Constitution
• The Growth of Parliament
• The Challenge of Parliamentary Supremacy
• The Common Law Tradition
• The Republican Tradition and the Struggle For Constitutional Liberty
• The Influence of Continental Thinkers
• The Education of the Founders
• The French and American Revolutions Compared
• Appendix A: Relevant Chapters of Magna Charta (1215)
• Appendix B: Petition of Right (1628)
• Appendix C: The English Bill of Rights (1689) an Act For Declaring the Rights and Liberties of the Subject, and Settling the Succession of the Crown.
• Part 2: America’s First Constitutions and Declarations of Rights
• Points to Remember
• Colonial Governments
• Relations With Great Britain
• Local Government In the Colonies
• Civil Liberties In the Colonies
• The Movement Toward Independence
• The Declaration of Independence
• The Rights Proclaimed
• The First State Constitutions, 1776–1783
• The Articles of Confederation
• Appendix A: the Mayflower Compact
• Appendix B: Fundamental Orders of Connecticut
• Appendix C: Declaration and Resolves of the First Continental Congress
• Appendix D: Declaration of the Causes and Necessity of Taking Up Arms
• Appendix E: the Declaration of Independence (1776)
• Appendix F: Virginia Bill of Rights
• Appendix G: Thoughts On Government
• Appendix H: Massachusetts Constitution of 1780
• Appendix I: Articles of Confederation (1778)
• Part 3: The Achievement of the Philadelphia Convention
• Points to Remember
• The Problems of the Convention
• The Delegates to the Convention
• A Wide Range of Talents
• Plans and Progress At Philadelphia
• The Meaning of “federal”
• The Virginia Plan: a Supreme National Government
• Hamilton’s Concept of a Unified America
• The New Jersey Plan:checks Upon Central Power
• The Benefits of Compromise
• Compromise and Consensus
• Appendix A: Virginia Plan
• Appendix B: New Jersey Plan
• Appendix C: Constitution of the United States of America (1787)
• Part 4: Basic Constitutional Concepts: Federalism, Separation of Powers, and Rule of Law
• Points to Remember
• A.: Federalism
• Powers Delegated to Congress
• Powers Denied to Congress
• Powers Denied to the States
• The Division of Powers
• The Supremacy Clause
• National and State Obligations
• Obligations of the National Government to the States
• Obligations of the States to the National Government
• Obligations of the States to Each Other
• The Role of the States In the Amendment Process
• The Federalism Factor
• The Advantages of Federalism
• The Future of Federalism
• B.: the Separation of Powers
• Checks and Balances
• Checks Upon the Congress
• Checks Upon the President
• Checks Upon the Judiciary
• The Independence of Congress
• The Independence of the President
• The Independence of the Judiciary
• Summary and Review
• Separation of Powers: a Critical Evaluation
• Separation of Powers At the Crossroads
• C.: The Rule of Law
• The Basic Principles of the American Constitution
• Appendix A: the Federalist No. 10
• Appendix B: the Federalist No. 45
• Appendix C: The Federalist No. 47
• Part 5: Defending the Constitution: the Struggle Over Ratification and the Bill of Rights
• Points to Remember
• A.: the Anti-federalist Persuasion
• The Constitution Establishes a Consolidated Empire
• The Constitution Establishes an Aristocracy
• The Constitution Confers Too Much Power
• An Imperial Congress
• An Elected Monarch
• An Omnipotent Judiciary
• B.: the Federalist Response
• The Constitution Limits and Distributes Power
• Congress Is Not an Oligarchy
• The President Is Not a King
• The Judiciary Is the Least Dangerous Branch
• Whether a Bill of Rights Was Necessary
• The Clash of Values
• C.: The Bill of Rights
• The First Amendment: Religious Freedom, and Freedom to Speak, Print, Assemble, and Petition
• The Second Amendment: the Right to Bear Arms
• The Third Amendment: Quartering Troops
• The Fourth Amendment: Search and Seizure
• The Fifth Amendment: Rights of Persons
• The Sixth Amendment: Rights of the Accused
• The Seventh Amendment: Trial By Jury In Civil Cases
• The Eighth Amendment: Bail and Cruel and Unusual Punishments
• The Ninth Amendment: Rights Retained By the People
• The Tenth Amendment: Rights Retained By the States
• Rights Versus Duties
• Appendix A: the Address and Reasons of Dissent of the Minority of the Convention of the State of Pennsylvania to Their Constituents
• Appendix B: Northwest Ordinance (1787)
• Part 6: Interpreting and Preserving the Constitution
• Points to Remember
• Principles of Statutory Construction
• The Doctrine of Judicial Review
• The Supreme Court As Final Interpreter
• The States As Final Interpreters
• Strict Versus Loose Construction
• The Independence of the Judiciary
• A.: Origins of Judicial Independence
• B.: the Judicial Power
• C.: Jurisdiction
• Appendix A: Marbury V. Madison
• Appendix B: Martin V. Hunter’s Lessee
• Appendix C: Washington’s Farewell Address (1796)
• Part 7: Changing the Constitution—together With an Explanation of the Amendments Added Since 1791
• Points to Remember
• Our Living Constitution
• Our Changing Constitution
• Amending the Constitution
• The Limits of the Amending Power
• The Amended Constitution
• A.: Amendment Xi (1798)
• B.: Amendment Xii (1804)
• C.: Amendment Xiii (1865)
• D.: Amendment Xiv (1868)
• E.: Amendment Xv (1870)
• F.: Amendment Xvi (1913)
• G.: Amendment Xvii (1913)
• H.: Amendment Xviii (1919)
• I.: Amendment Xix (1920)
• J.: Amendment Xx (1933)
• K.: Amendment Xxi (1933)
• L.: Amendment Xxii (1951)
• M.: Amendment Xxiii (1961)
• N.: Amendment Xxiv (1964)
• O.: Amendment Xxv (1967)
• P.: Amendment Xxvi (1971)
• Q.: Amendment Xxvii (1992)
• Conclusion

The Fourth Amendment: Search and Seizure

This is a requirement for search warrants when the public authority decides to search individuals or their houses, or to seize their property in connection with some legal action or investigation. In general, any search without a warrant is unreasonable. Under certain conditions, however, no warrant is necessary—as when the search is incidental to a lawful arrest.

Before engaging in a search, the police must appear before a magistrate and, under oath, prove that they have good cause to believe that a search should be made. The warrant must specify the place to be searched and the property to be seized. This requirement is an American version of the old English principle that “Every man’s house is his castle.” In recent decades, courts have extended the protections of this amendment to require warrants for the search and seizure of intangible property, such as conversations recorded through electronic eavesdropping.