"Racial" rubber vault contraceptive cap, London, England, c. 1915-1925 (also called cervical or diaphragm cap). The Mother's Clinic, which opened in 1921, supplied these contraceptive caps to women. This "Racial" brand of cervical cap related to Marie Stopes's belief in eugenics. This widely held racist theory from the early 1900s argued that selective breeding could remove "undesirables" from society. Marie Stopes (1880-1958) founded the Society for Constructive Birth Control. She opened the first of her birth control clinics in Holloway, North London in 1921. She is best remembered as a feminist and a birth control pioneer, though she also made significant contributions to plant palaeontology and coal classification, and was the first female academic on the faculty of the University of Manchester. Her sex manual Married Love (1918) brought the subject of birth control into wide public discourse.