Background
She was born Mary Susette Sandoz, on May 11, 1896 in Sheridan County, Nebraska, United States, the daughter of Jules Ami Sandoz, a rancher and horticulturist, and Mary Elizabeth Fehr, both Swiss immigrants. Her father, the most important influence on her life, was a champion of small farmers, but he was also an egomaniac and a domestic tyrant whose intellectual gifts and social achievements were marred by an almost constant round of lawsuits against his neighbors and violent rages against his wife and children. All her life one of Sandoz's hands was partially crippled because her enraged father had broken a bone in it.
Her entire early life was dangerous even by frontier standards; sent out at the age of twelve to bring in the cattle during a blizzard, Sandoz suffered an attack of snow blindness and never recovered her sight in one eye.