Mary Sumner was the founder of what would become the largest and most powerful women's organisation in the Church of England - the Mother's Union. In this fascinating, thought-provoking study of Sumner's life and activism, Sue Anderson-Faithful outlines the significant moral, educational and philanthropic influence exercised by an ostensibly non-political institution across a breadth of women's concerns. Sumner's own emotional and theological interiority is also sensitively and insightfully handled. This book will make an extremely valuable contribution to the growing field of scholarship on women, religion and associational life.