Agnes Edna Ryan was born in Stuart, Iowa, to Edward and Mary A. Ryan. She had two siblings, John and Katherine Ryan.[4]
Graduating from Boston University in 1903, Ryan went on to work for the Riverside Press in Cambridge, Massachusetts, and as a staff member of the Congregationalist and National magazines, as well as the Boston American. In 1910, she became managing editor of a suffrage publication, the Woman's Journal. In 1915, Agnes E. Ryan married Henry Bailey Stevens, who worked as the assistant editor for the Woman's Journal.[4] In order to keep her last name, she went to court and successfully challenged the law that required women to take their husband's last name. The couple adopted two children, Peter and Patricia.[4]
Ryan was among the feminist vegetarians who, during World War I, made a connection between meat eating and the killing of human beings in the Great War.[5]: 123
In Ryan's unpublished novel, "Who Can Fear Too Many Stars?," she depicts vegetarianism as a way of resisting male dominance. [5]: 132