"Doomed from birth" was how psychologist Harold Skeels described two toddler girls at the Iowa Soldiers' Orphans' Home in Davenport, Iowa, in 1934. Their IQ scores, added together, totaled just 81. Following prevailing eugenic beliefs of the times, Skeels and his colleague Marie Skodak assumed that the girls had inherited their parents' low intelligence and were therefore unfit for adoption. The girls were sent to an institution for the "feebleminded"...