  More systematic written discussion of the concept of privacy is often said to begin with the famous essay by Samuel Warren and Louis Brandeis titled “The Right to Privacy” (Warren and Brandeis, 1890). Citing “political, social, and economic changes” and a recognition of “the right to be let alone” they argued that existing law afforded a way to protect the privacy of the individual, and they sought to explain the nature and extent of that protection. Focusing in large part on the press and publicity allowed by recent inventions such as photography and newspapers, but referring as well to violations in other contexts, they emphasized the invasion of privacy brought about by public dissemination of details relating to a person’s private life. Warren and Brandeis felt a variety of existing cases could be protected under a more general right to privacy which would protect the extent to which one’s thoughts, sentiments, and emotions could be shared with others.  Urging that they were not attempting to protect the items produced, or intellectual property, but rather the peace of mind attained with such protection, they said the right to privacy was based on a principle of “inviolate personality” which was part of a general right of immunity of the person, “the right to one’s personality” (Warren and Brandeis 1890, 195, 215). The privacy principle, they believed, was already part of common law and the protection of one’s home as one’s castle, but new technology made it important to explicitly and separately recognize this protection under the name of privacy. They suggested that limitations of the right could be determined by analogy with the law of slander and libel, and would not prevent publication of information about public officials running for office, for example. Warren and Brandeis thus laid the foundation for a concept of privacy that has come to be known as control over information about oneself.