Mary Suzannah Beck Vaillant Hatt (March 20, 1908 – February 18, 1995) was an American archaeologist, translator, and activist, working on-site in central Mexico with her first husband, anthropologist George Clapp Vaillant, and traveling the world with her second husband, zoologist Robert T. Hatt.
[6][7][8] With her second husband, zoologist Robert Torrens Hatt, she traveled in Asia, Africa, and the Americas, studying small mammals including mice, rats, squirrels, and shrews.
Hatt was active in politics, especially in protesting the Vietnam War[10] and supporting the campaigns of Eugene McCarthy.
[11] In 1966, as a member of the Episcopal Society for Cultural and Racial Unity, she was arrested in Detroit while protesting the relocation of a family for an urban renewal project.
[2] They lived in the former home of sculptor Carl Milles in Bloomfield Hills, Michigan,[11] and then in Washington, D.C., from 1967 to 1987.