The Kallikak Family: A Study in the Heredity of Feeble-Mindedness was a 1912 book by the American psychologist and eugenicist Henry H. Goddard, dedicated to his patron Samuel Simeon Fels. Supposedly an extended case study of Goddard’s for the inheritance of "feeble-mindedness", a general category referring to a variety of mental disabilities including intellectual disability, learning disabilities, and mental illness, the book is noted for factual inaccuracies that render its conclusions invalid. Goddard believed that a variety of mental traits were hereditary and that society should limit reproduction by people possessing these traits. The name Kallikak is a pseudonym used as a family name throughout the book. Goddard coined the name from the Greek words καλός (kallos) meaning good and κακός (kakos) meaning bad. Summary The book begins by discussing the case of "Deborah Kallikak" (real name Emma Wolverton, 1889–1978), a woman in Goddard's institution, the New Jersey Home for the Education and Care of Feebleminded Children (now Vineland Training School). In the course of investigating her genealogy, Goddard claims to have discovered that her family tree bore a curious and surprising moral tale. The book follows the genealogy of Martin Kallikak, Deborah's great-great-great grandfather, a Revolutionary War hero married to a Quaker woman. On his way back from battle the normally morally upright Martin dallied one time with a "feeble-minded" barmaid. He impregnated her and then abandoned her. The young Martin soon reformed and went on with his upright life, becoming a respected New England citizen and father of a large family of prosperous individuals. All of the children that came from this relationship were "wholesome" and had no signs of developmental disabilities. But according to Goddard, a child was born by the dalliance with "the nameless feeble-minded girl". This single child, a male, called Martin Kallikak Jr. in the book (real name John Wolverton, 1776–1861), went on to father more children, who fathered their own children, and on and on down the generations. And so with the Kallikaks, Goddard claims to have discovered, one has as close as one could imagine an experiment in the hereditability of intelligence, moral ability, and criminality. On the "feeble-minded" side of the Kallikak family, descended from the abandoned single-parent barmaid, the children wound up poor, mentally ill, delinquent, and intellectually disabled. Deborah was, in Goddard's assessment, "feeble-minded": a catch-all early 20th century term to describe various forms of intellectual or learning disabilities.