Редактирование: Eugenics (раздел)

=== Spread to North America and popular adoption ===

==== The Jukes family ====

==== The "Kallikak" family ====

In 1912, the movement was further advanced by the publication of <i>The Kallikak Family: A Study in the Heredity of Feeble-Mindedness</i> by Henry H. Goddard and its subsequent popularity.  The book portrays a falsified history of a family divided into "good" and "bad" branches to demonstrate the heredity of "feeble-mindedness."

In truth, the families were unrelated, and many of the portrayed deficiencies of the "bad" branch of the family were fabricated or heavily embellished, while non-hereditary factors such as nutrional deficiencies and fetal alcohol syndrome were ignored.