Samuel Dennis Warren (1852 - February 18, 1910), also Samuel Dennis Warren II, was a Boston attorney.
Warren was born in 1852. His father was also named Samuel Dennis Warren, known as S.D. Warren, who founded the Cumberland Paper Mills in Maine. He had four siblings: Cornelia Lyman Warren, philanthropist; Henry Clarke Warren (1854-1899), scholar of Sanskrit and Pali; Edward Perry Warren (1860-1928), art collector; Fredrick Fiske Warren (1862-1938), political radical and utopist. He graduated from Harvard College in 1875 and graduated second in his class at Harvard Law School in 1877. The first-place student was his friend Louis Brandeis, later a justice of the United States Supreme Court. Warren was editor of the Harvard Crimson. Warren and Brandeis founded the prominent Boston law firm of Nutter McClennen & Fish in 1879. At the end of 1890 they published their famous law review article "The Right to Privacy" in the Harvard Law Review. It is "one of the most influential essays in the history of American law" and is widely regarded as the first publication in the United States to advocate a right to privacy, articulating that right primarily as a "right to be let alone" which referred to paragraph 11 of the 1868 law of the press of France. Brandeis later acknowledged that the idea for the essay originated with Warren's "deep-seated abhorrance of the invasions of social privacy" on the part of the press.
In 1899, he left law to oversee the family's paper production business. He managed the family trust established in May 1889 with the legal assistance of Brandeis to benefit his father's widow and 5 children. In 1906, Warren's brothers Edward and Fiske charged that Brandeis had structured the trust to benefit Samuel at the expense of his siblings. The dispute ended with Samuel's suicide in 1910. The Warren Trust case became a point of contention during the 1916 Senate hearings on the confirmation of Brandeis to the Supreme Court and it remains important for its explication of legal ethics and professional responsibility.
He committed suicide in Dedham, Massachusetts, on February 18, 1910. His family disguised his suicide and the date of his death. The New York Times reported that he died of apoplexy on February 20.