1) Burt, C. The genetic determination of differences in intelligence: A study of monozygotic twins reared together and apart. British Journal of Psychology, 1966, 57. 137-153.

2) Gottesman, III. Biogenetics of race and class. In M. Deutsch. I. Katz, and A.R. Jensen (Eds.) Social Class, Race, and Psychological Development. New York: Holt, Rinchart, & Winston, 1968. Pp. 11-51.

3) Honzik, M.P. Developmental studies of parent-child resemblances in intelligence. Child Development, 1957, 28. 215-228.

4) Jensen, A.R. I.Q.'s of identical twins reared apart. Behavior Genetics, 1970, 1. 133-148.

5) Jinks, J.L. and Fulkner, D.W. Comparison of the biometrical genetical, MAVA, and classical approaches to the analysis of human behavior. Psychological Bulletin, 1970, 73, 311-349.

6) MacArthur, R.S. Some cognitive abilities of Eskimo, white and Indian-Metis pupils aged 9 to 12 years. Canadian Journal of Behavioral Sciences, 1969, 1, 50-59.

7) Noble, C.E. Race, reality, and experimental psychology. Perspectives in Biology and Medicine, 1969, 13, 10-30.

8) Vernon, M. Fifty years of research on the intelligence of deaf and hard-of-hearing children: A review of literature and discussion of implication. Journal of Rehabilitation of the Deal, 1968, 1, 1-12.

9)Cattell, R.B. The multiple abstract variance analysis equations and solutions: For nature-nurture research on continuous variables. Psychological Review, 1960, 67, 353-372.

10) Erlenmeyer-Kimling, L. and Jarvik, L.F. Genetics and intelligence: a review, Science, 1963, 142, 1477-1479.

You should also look carefully at Environment, Heredity, and Intelligence, Harvard Educational Review, Reprint Series No. 2. You will find that the high heritability of I.Q. is generally accepted by virtually all workers who are conversant with the data on I.Q. and with the technical concept of heritability. They argue about details, but not about the large points.

As I understand your letter, you feel I should not write on a subject with deep social implications because dissemination of the truth may make certain social goals harder to obtain. I, in contrast, do not agree that the truth will make those goals harder to obtain. Moreover, I believe that the truth should influence our thinking in defining social goals. Now, you may dispute whether or not my article is truthful, but first I suggest you consult the large (and rapidly growing) literature on the subject.   R.J. Herrnstein

JANUARY 11, 1972

Dear Professor Herrnstein:

Thank you for letting me have the list of references in the eugenics field. I did of course not intend in my letter to deny the possibility that intelligence is inheritable, but I was rather concerned with the inferences of the Atlantic article which might or might not be drawn therefrom for differences in average intelligence in racial groups.