Betty Peterson was born in the United States in 1917. As social activists, pacifists and Quakers, she and her late husband, Gunnar Peterson, were conscientious objectors during World War II. They also participated in the civil rights movement in Chicago for 23 years and in Vietnam War protests before leaving the United States to settle in Halifax in 1975. In Nova Scotia Peterson continued her advocacy for the peace movement, especially with the Voice of Women for Peace and Halifax Society of Friends (Quakers), and also supported causes concerning the environment, feminism, education, nuclear disarmament, and aboriginal rights. She participated in several out-of-province crusades, which were supported in part by Canadian Society of Friends and chronicled in national media reports, including a 1988 trek to Little Buffalo, Alberta, to support the Lubicon Cree Nation's land-claim fight and a 1987 trip to Goose Bay, Labrador to stand with the Innu protesting low flying military planes. Among her many activities in Halifax were participating in ecumenical movements for social justice (with Kairos), protesting the 1991 Gulf War, and promoting an alternative People's Summit (P7) during the 1995 G-7 meeting held in Halifax, NS. In the early 2000s she participated in public vigils protesting the wars in Iraq and Afghanistan and was a founding member of the Raging Grannies, a greying band of activists who used street theatre to promote peace and women's rights. In most of these organizations Peterson had a major role such as organizing, planning, and keeping detailed records of activities, names, strategies and results. She died on February 24, 2018, at the age of 100, in Halifax, NS.