1604 Semayne's Case states the sanctity of the home The English common-law maxim that a person's house is their castle became a foundational privacy principle. 1763 Wilkes v. Wood limits general warrants The case became a landmark in protection against intrusive state searches. 1765 Entick v. Carrington strengthens protections against arbitrary search The judgment became a classic statement that the state cannot intrude without lawful authority. 1776 Virginia Declaration of Rights protects against general warrants American revolutionary constitutionalism linked liberty to security in property and person. 1789 French Declaration of the Rights of Man redefines civil liberty Although not a privacy charter, it helped establish the rights-centered constitutional language in which privacy would later develop. 1791 Fourth Amendment is ratified in the United States Protection against unreasonable searches and seizures became a core constitutional privacy guarantee. 1890 Warren and Brandeis publish The Right to Privacy Their Harvard Law Review article gave modern privacy law one of its defining formulations. 1948 Universal Declaration of Human Rights includes privacy Article 12 recognized privacy, family, home, and correspondence as matters of universal right. 1950 European Convention on Human Rights protects private life Article 8 established one of the most influential modern treaty protections for privacy. 1967 Katz v. United States creates the reasonable-expectation test The U.S. Supreme Court adapted privacy doctrine to the age of electronic surveillance. 1970 Fair Credit Reporting Act regulates personal data held by consumer bureaus Data privacy entered consumer law as computerized records became more important. 1973 HEW report proposes fair information practices The U.S. government's advisory framework influenced later privacy and data-protection rules worldwide. 1974 U.S. Privacy Act is enacted Federal agencies received statutory rules on collecting, using, and disclosing personal records. 1980 OECD adopts Privacy Guidelines The first internationally agreed privacy principles helped harmonize data-protection policy across borders. 1981 Convention 108 opens for signature The Council of Europe's data-protection convention became a landmark international legal instrument. 1995 EU adopts the Data Protection Directive The directive created a continent-wide framework for personal-data processing and transfer. 2001 Budapest Convention addresses digital evidence and privacy tensions Networked investigations made privacy debates inseparable from transnational digital policing. 2013 Snowden disclosures globalize digital privacy concerns Revelations about mass surveillance turned privacy into a central issue of the internet age. 2016 European Union adopts the GDPR The General Data Protection Regulation set a powerful new global benchmark for data privacy. 2018 GDPR begins enforcement The regulation's enforcement changed compliance expectations for organizations handling personal data worldwide. 2018 Carpenter v. United States limits access to cell-site data The U.S. Supreme Court extended privacy protections into the smartphone era. 2021 App Tracking Transparency reshapes consumer privacy expectations Mobile operating-system privacy controls gave users a more direct role in limiting commercial tracking.