 She became involved in education of mothers, feminism and pacifism.In 1928 Madeleine Vernet was secretary general of the "Comité international d’action et propagande pour la paix et le désarmement" (International Committee of action and propaganda for peace and disarmament).The committee's organ was "La volonté de paix" (Will for Peace), which she had founded in June 1927 and was published until January 1936.