Mary Baker Eddy (July 16, 1821 – December 3, 1910) was the founder of Christian Science, a new religious movement, in the United States in the latter half of the 19th century.
Eddy wrote the movement's textbook, Science and Health with Key to the Scriptures (first published 1875), and in 1879 founded the Church of Christ, Scientist. She also founded the Christian Science Publishing Society (1898), which continues to publish a number of periodicals, including The Christian Science Monitor (1908).
Eddy was born Mary Morse Baker in a farmhouse in Bow, New Hampshire, to a farmer, Mark Baker (d. 1865), and his wife, Abigail Barnard Baker, née Ambrose (d. 1849). Eddy was the youngest of the Bakers' six children.
