Margaret Sanger aligned herself with the eugenicists whose ideology prevailed in the early 20th century. Eugenicists strongly espoused racial supremacy and "purtiy"," particularly of the "Aryan" race. Eugenicists hoped to purify the bloodlines and improve the race by encouraging the "fit" to reproduce and the "unfit" to restrict their reproduction. They sought to contain the "inferior" races through segregation, sterilization, birth control and abortion.