The document discusses the right to privacy in the United States. It defines privacy as the right to be left alone and do what you want without government interference. However, privacy is not explicitly mentioned in the Constitution. The document examines where a right to privacy is derived from and how courts determine if privacy has been violated by weighing reasonable expectations of privacy against government interests. It also analyzes the extent of the right to privacy in different contexts such as the home, school, reproductive decisions, and national security cases.