In 1956, when La Leche League was founded, if a new mother chose to breastfeed rather than bottlefeed her child, she could by no means expect universal support for her decision. Though physicians of the era admitted that breastfeeding was the best method of infant feeding, they warned of the difficulties that nursing mothers faced, and many held that successful breastfeeding required a knowledge of science and medicine that most new mothers could not claim. Started by seven Catholic women who simply wished to help their friends learn to breastfeed, La Leche League grew into an organization...