Abby Morton Diaz (1821-1904) was born in Plymouth, Massachusetts, and died in Belmont, Massachusetts. Diaz was a teacher, author, and social reformer who founded the Women's Educational and Industrial Union of Boston in 1877. The Union advocated for the rights of women and girls and also provided legal protection. In addition to her work as social reformer, Diaz wrote several books, including Domestic Problems (1884), Bybury to Beacon Street (1887), and Only A Flock of Women (1893). She studied mental healing with Anna B. Newman, a former student of Mary Baker Eddy's who resigned from the Christian Scientist Association as part of the Lynn Rebellion. Diaz went on to author several pamphlets and gave lectures on the subject of mental healing. Although Diaz met with Mary Baker Eddy and identified as a Christian Scientist in later life, there is no record of her studying with Eddy or uniting with The First Church of Christ, Scientist.

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