Lucille Mathurin Mair (née Walrond) made a mammoth contribution to women in Jamaica and across the world. In this biography, Verene Shepherd traces Mair’s evolving ideology through her roles as professional historian, wife, mother, mentor, diplomat, national and international civil servant, legislator, and women’s rights activist. Mair’s tireless commitment to the principles of justice and equality for women guided her work and she particularly sought to centre women of the Global South in the development agenda.