Wilson was a founding member of the Women's International League for Peace and Freedom, and served on the general committee of the Fellowship of Reconciliation from 1915 to 1922. She was editor of The New Crusader, a pacifist periodical, from 1917. She spoke at meetings in Trecynon and Merthyr in 1917, and at a peace rally in Bishopsgate in 1918; she also spoke at Society of Friends meetings in Manchester in 1914, 1933 and 1934, and in London in 1936.
