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Human inbreeding avoidance: Culture in nature

Published online by Cambridge University Press:  04 February 2010

Pierre L. van den Berghe
Affiliation:
Department of Sociology, University of Washington, Seattle, Wash. 98195

Abstract

Much clinical and ethnographic evidence suggests that humans, like many other organisms, are selected to avoid close inbreeding because of the fitness costs of inbreeding depression. The proximate mechanism of human inbreeding avoidance seems to be precultural, and to involve the interaction of genetic predispositions and environmental conditions. As first suggested by E. Westermarck, and supported by evidence from Israeli kibbutzim, Chinese sim-pua marriage, and much convergent ethnographic and clinical evidence, humans negatively imprint on intimate associates during a critical period of early childhood (between ages 2 and 6).

There is also much evidence that, like other social animals, humans do not seek to maximize outbreeding, but rather to maintain an optimal balance between outbreeding and inbreeding. Close inbreeding reduces fitness through inbreeding depression, but some inbreeding brings the benefits of nepotism. For simple, stateless, horticultural societies, the optimal balance seems to be achieved by a combination of precultural inbreeding avoidance of relatives with an r ≤·25 and cultural rules of preferential marriage with kin with r ≥·25. Adjustment of the coefficient of inbreeding to other ecological settings seems to be largely cultural. An interactive model of “culture in nature” is presented, in which culture is seen as coevolving with genes to produce the maxiniization of individual inclusive fitness.

Type
Target Article
Copyright
Copyright © Cambridge University Press 1983

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References

Aberle, D. F., Bronfenbrenner, U., Hess, E. H., Miller, D. R., Schneider, D. M. & Spuhler, J. M. (1963) The incest taboo and the mating patterns of animals. American Anthropologist 65: 253–65. [taPLvdB]CrossRefGoogle Scholar
Adams, M. S. & Neel, J. V. (1967) Children of incest. Pediatrics 40: 5562. [AHB]CrossRefGoogle ScholarPubMed
Alexander, R. D. (1971) The search for an evolutionary philosophy of man.Proceedings of the Royal Society of Victoria 84: 99120. [LMD]Google Scholar
Alexander, R. D. (1974) The evolution of social behavior. Annual Review of Ecology and Systematics 5: 325–83. [WI]CrossRefGoogle Scholar
Alexander, R. D. (1979) Darwinism and human affairs. University of Washimgton Press. [RHB, MD, DGF, tarPLvdB]Google Scholar
Armstrong, L. (1979) Kiss daddy goodnight. Pocket Books. [taPLvdB]Google Scholar
Banfield, E. (1958) The moral basis of a backward society. Free Press. [UM]Google Scholar
Barash, D. P. (1977) Sociobiology and behavior. Elsevier. [DGF, taPLvdB]Google Scholar
Barnes, J. A. (1951) Marriage in a changing society. Oxford University Press. [taPLvdB]Google Scholar
Bateson, P. (1978) Sexual imprinting and optimal outbreeding. Nature 273: 659-60. [PB, RHB, MD, RD, taPLvdB]CrossRefGoogle ScholarPubMed
Bateson, P. (1979) How do sensitive periods arise and what are they for? Animal Bchaviour 27: 470–86. [PB]CrossRefGoogle Scholar
Bateson, P. (1980) Optimal outbreeding and the development of sexual preferences in Japanese quail. Zcitschrift für Tierpsychologie 53: 231–44. [PB]CrossRefGoogle Scholar
Bateson, P. (1982a) Optimal outbreeding. In: Mate choice, ed. Bateson, P.. Cambridge University Press, in press. [PB]Google Scholar
Bateson, P. (1982b) Preferences for cousins in Japanese quail. Nature 295: 236–37. [PB, RHB, PKS]CrossRefGoogle Scholar
Bekoff, M. (1981) Mammalian sibling interactions: Genes, facilitative environments, and the coefficient of familiarity. In: Parental care in mammals, ed. Gubernick, D. V. & Klopfer, P. H., pp. 307–46. Plenum Press. [RHB]CrossRefGoogle Scholar
Bengtsson, B. O. (1978) Avoiding incest – at what cost? Journal of Theoretical Biology 73: 439–44. [MEL]CrossRefGoogle Scholar
Bischof, N. (1975) Comparative ethology of incest avoidance. In: Biosocial anthropology, ed. Fox, H., pp 3767. Wiley. [taPLvdB, LT]Google Scholar
Bittles, A. H. (1979) Incest re-assessed. Nature 280: 107. [AHB]CrossRefGoogle Scholar
Bittles, A. H. (1980) Inbreeding in human populations. Journal of Scientific and industrial Research 39: 768–77. [AHB]Google Scholar
Bixler, R. H. (1981a) Incest avoidance as a function of environment and heredity. Current Anthropology 22: 639–43. [taPLvdB]CrossRefGoogle Scholar
Bixler, H. H. (1981b) The incest controversy. Psychological Reports 49: 267–83. [RHB, PKS. taPLvdB]CrossRefGoogle ScholarPubMed
Bixler, H. H. (1981c) Primate mother-son “incest”. Psychological Reports 48: 531–36. [RHB, taPLvdB]CrossRefGoogle Scholar
Bixler, H. H. (1982) Sibling incest in the royal families of Egypt, Peru, and Hawaii. Journal of Sex Research, in press. [RHB]CrossRefGoogle Scholar
Bock, K. (1980) Human nature and history – A response to sociobiology. Columbia University Press. [DGF]CrossRefGoogle Scholar
Burgess, A. W., Groth, A. N., Hormstrom, L. L. & Sgroi, S. M. (1978) Sexual assault of children and adolescents. Heath. [taPLvdB]Google Scholar
Butler, S. (1978) Conspiracy of silence: The trauma of incest. New Glide Publications. [taPLvdB]Google Scholar
Campbell, D. T. (1975) On the conflicts between biological and social evolution and between psychology and moral tradition. American Psychologist 30: 1103–26. [DGF]CrossRefGoogle Scholar
Carr, D. H. (1971) Chromosomes and abortion. Advances in Human Genetics 2: 201–57. [AHB]Google Scholar
Cavalli-Sforza, L. L. (1977) Elements of human genetics. Benjamin. [taPLvdB]Google Scholar
Cavalli-Sforza, L. L. & Bodmer, W. F. (1971) The genetics of human populations. Freeman. [FBL, taPLvdB]Google Scholar
Centerwall, W. R. & Centerwall, S. A. (1966) Consanguinity and congenital anomalies in South India: A pilot study. Indian Journal of Medical Research 54: 1160–67. [AHB]Google ScholarPubMed
Centerwall, W. R., Savarinathan, G., Mohan, L. R., Booshanan, V. & Zachariah, M. (1969) Inbreeding patterns in rural South India. Social Biology 16: 8191. [AHB]Google Scholar
Chakraborty, R. & Chakravarti, A. (1977) On consanguineous marriages and the genetic load. Human Genetics 36: 4754. [AHB]CrossRefGoogle ScholarPubMed
Charlesworth, B. D. (1981) Comments on “Bixler: incest avoidance”. Current Anthropology 22: 644. [MEL, rPLvdB]Google Scholar
Charnov, E. L. (1979) Simultaneous hermaphorditism and sexual selection. Proceedings of the National Academy of Sciences 76: 2480–84. [MEL]CrossRefGoogle ScholarPubMed
Charnov, E. L. (1982) The theory of sex allocation. Princeton monograph in population biology, 18. Princeton University Press. [MEL]Google Scholar
Chomsky, N. (1980) Rules and representations. Columbia University Press. [CJL]Google Scholar
Clutton-Brock, T. H. & Harvey, P. H. (1976) Evolutionary rules and primate societies. In: Growing points in ethology, ed. Bateson, P. P. C. & Hinde, R. A., pp. 195237. Cambridge University Press. [MEL, rPLvdB]Google Scholar
Cohen, Y. A. (1978) The disappearance of the incest taboo. Human Nature 1: 2728.[taPLvdB]Google Scholar
Daly, M. & Wilson, M. (1978) Sex, evolution and behavior. Duxbury Press. [taPLvdB]Google Scholar
Dawkins, R. (1976) The selfish gene. Oxford University Press. [DGF]Google Scholar
Dawkins, R. (1979) Twelve misunderstandings of kin selection. Zeitschrift für Tierpsychologie 51: 184200.[PB, RD, rPLvdB]CrossRefGoogle Scholar
Dawkins, R. (1982) The extended phenotype. W. H. Freeman. [RD]Google Scholar
DeFrancis, V. (1969) Protecting the child victim of sex crimes committed by adults. Tue American Humane Association Children's Division. [taPLvdB]Google Scholar
De, Heusch L. (1958) Essai sur le symbolisme de l'inceste royal en Afrique. Institute de Sociologie Solvay. [taPLvdB]Google Scholar
Demarest, W. J. (1977) Incest avoidance among human and non-human primates. In: Primate biosocial development, ed. Chevalier-Skolnikoff, S. & Poirier, F. E., pp. 323–42. Garland. [WJD, JS, taPLvdB]Google Scholar
Dickemann, M. (1979a) The ecology of mating systems in hypcrgyimomms dowry Societies. Social Science Information 18: 163–95. [CSL, rPLvdB]CrossRefGoogle Scholar
Dickemann, M. (1979b) Female infanticide, reproductive strategies, and social stratification. In: Evolutionary biology and human social behavior; An anthropological perspective, ed. Chagnon, N. A. & Irons, W., pp. 321-67. Duxbury Press. [CSL, rPLvdB]Google Scholar
Dronamnraju, K. R. & Meera, Khan P. (1963) The frequency and effects of consanguineous marriages in Andhra Pradesh. Journal of Genetics 58: 387401. [AHB]CrossRefGoogle Scholar
Durham, W. H. (1979) Toward a coevolutionary theory of human biology and culture. In: Evolutionary biology and human social behavior, ed. Chagnon, N. A. & Irons, W., pp. 3959. Duxbury Press. [DGF, PKS, taPLvclB]Google Scholar
Durkheim, E. (1893) De la division du travail social. Alcan. [UM]Google Scholar
Durkheim, E. (1897) La prohibition do l'inceste et ses conséquences. L'Année Sociologique, vol. 1. [taPLvdB]Google Scholar
Finkelhor, D. (1979) Sexually victimized children. Free Press. [taPLvdB]Google Scholar
Finkelhor, D. (1980) Sex among siblings. Archives of Sexual Behavior 9: 171–94. [taPLvdB]CrossRefGoogle ScholarPubMed
Fisher, R. A. (1930) The genetical theory of natural selection. Clarendon Press.[UM]Google Scholar
Fortes, M. (1949) The web of kinship among the Tallensi. Oxford University Press. [taPLvdB]Google Scholar
Fortune, R. W. (1932) Incest. Encyclopaedia of the Social Sciences 7: 620–22. [taPLvdB]Google Scholar
Fox, R. (1962) Sibling incest. British Journal of Sociology 13: 128–50. [taPLvdB]CrossRefGoogle Scholar
Fox, R. (1967) Kinship and marriage. Penguin. [KCM, taPLvdB]Google Scholar
Fox, R. (1971) The cultural animal. In: Man and beast, ed. Eisenberg, J. E. & Dillon, W. S.. Smithsonian Institution Press. [WI]Google Scholar
Fox, R. (1980) The red lamp of incest. Dutton. [WI, KCM, PKS, taPLvdB]Google Scholar
Fraser, F. C. & Biddle, C. J. (1976) Estimating the risks for offspring of first cousin matings. American Journal of Human Genetics 28: 522–26. [AHB]Google ScholarPubMed
Frazer, J. C. (1910) Totemism and exogamy. Macmillan. [KCM, taPLvdB]Google Scholar
Freedman, D. G. (1979) Human sociobiology: A holistic approach. Free Press. [DGF, rPLvdB]Google Scholar
Freedman, D. G. & Freedman, N. A. (1969) Differences in behavior between newborn Chinese-American and European-American newborns. Nature 224: 1227. [DGF]Google Scholar
Freud, S. (1947) The ego and the id. 4th ed. Hogarth Press. [DGF]Google Scholar
Freud, S. (1950) Totem and taboo. V. W. Norton. First published 1913.[JS, taPLvdB]Google Scholar
Geiser, R. L. (1979) Hidden victims: The sexual abuse of children. Beacon Press. [taPLvdB]Google Scholar
Gloor, P. (1960) Amygdala. In: Handbook of physiology, neurophysiology II, ed. Field, J., Magoun, H. W. & Hall, V. E., pp. 13951420. American Physiological Society. [WJD]Google Scholar
Goggin, J. M. & Sturtevant, W. C. (1964) The Calusa. In: Explorations in cultural anthropology, ed. Goodenough, W. H., pp. 179219. McGrawHill. [taPLvdB]Google Scholar
Goody, J. (1956) A comparative approach to incest and adultery. British journal of Sociology 7: 286305.[taPLvdB]CrossRefGoogle Scholar
Goody, J. (1976) Production and reproduction. Cambridge Umsiversity Press.[PB, CSL]Google Scholar
Gould, J. L. (1982) Ethology. Norton.[RHB]Google Scholar
Gould, S. J. & Lewontin, R. C. (1979) The spandrels of San Marco and the Panglossian paradigm: A critique of the adaptationist programme. Proceedings of the Royal Society of London, Series B 205: 581–98. [FBL]Google Scholar
Grafen, A. (1982) How not to measure inclusive fitness. Nature 298: 425-26.[RD]Google Scholar
Greenberg, J. H. (1947) Islam and clan organization among the Hausa. Southwestern journal of Anthropology 3: 195211. [taPLvdB]CrossRefGoogle Scholar
Greenwood, P. J. & Harvey, P. H. (1977) Feeding strategies and dispersal of territorial passerines: A comparative study of thc blackbird Turdus merula, and the greenfinch Carduelis chloris. Ibis 119: 528–31. [MEL]Google Scholar
Hamilton, W. D. (1964) The genetical evolution of social behaviour. journal of Theoretical Biology 7: 152. [RD, DGF, taPLvdB]Google Scholar
Hamilton, W. D. (1978) Evolution and diversity under bark. In: Diversity of insect faunas, ed. Mound, L. A. & Waloff, N.. Blackwell. [MEL]Google Scholar
Hebb, D. O. (1958) A textbook of psychology. Saunders. [taPLvdB]Google Scholar
Hendricks, C. H. (1955) Congenital malformations: Analysis of the 1953 Ohio records. Obstetrics and Cynecology 6: 592–98. [AHB]Google Scholar
Herman, J. L. (1981) Father-daughter Incest. Harvard University Press. [KCM, taPLvdB]Google ScholarPubMed
Hopkins, K. (1980) Brother-sister marriage in Roman Egypt. Comparative Studies in Society and History 22: 303–54. [PB, RHB]CrossRefGoogle Scholar
Hrdý, S. B. (1977) The langurs of Abu. Harvard University Press. [JS]Google Scholar
Irons, W. (1981) Why lineage exogamy?In: Natural selection and social behavior, ed. Alexander, R. D. & Tinkle, D. V.. Chiron Press. [WI]Google Scholar
Jacquard, A. (1974) The genetic structure of populations. Springer.[JS, rPLvdB]CrossRefGoogle Scholar
Jain, S. K. (1976) The evolution of inbreeding in plants. Annual Review of Ecology and Systematics 7: 469–95. [MEL]Google Scholar
Justice, B. & Justice, R. (1979) The broken taboo. Human Sciences Press. [taPLvdB]Google Scholar
Kaffman, M. (1977) Sexual standards and behavior of the kibbutz adolescent. American journal of Orthopsychiatry 47: 207–17. [FBL]Google Scholar
Keil, F. C. (1979) Semantic and cognitive development: An ontological perspective. Harvard University Press. [CJL].CrossRefGoogle Scholar
Keil, F. C. (1981) Constraints on knowledge and cognitive development. Psychological Review 88: 197227. [CJL]CrossRefGoogle Scholar
King's College Sociobiology Group (1982) Current problems in sociobiology. Cambridge University Press. [PB]Google Scholar
Kuhn, T. S. (1962) The structure of scientific revolutions. University of Chicago Press. [MR, taPLvdB]Google Scholar
Kunstadter, P., Buhler, R., Stephen, F. F. & Westoff, C. F. (1964) Demographic variability and preferential marriage patterns. American journal of Physical Anthropology 21: 511–19. [JS]Google Scholar
Kuper, H. (1978) Sobhuza II. Africans Publishing Company.[rPLvdB]Google Scholar
Kurland, J. A. (1979) Paternity, mother's brother, and human sociality. In: Evolutionary biology and human social behavior: An anthropological perspective, ed. Chagnon, N. A. & Irons, W., pp. 145-80. Duxbury Press. [UM]Google Scholar
Lancaster, C. S. (1981) The Goba of the Zambezi: Sex roles, economics, and change. University of Oklahoma Press. [CSL]Google Scholar
Lévi-Strauss, C. (1969) The elementary structures of kinship. Beacon Press. [CJL, taPLvclB]Google Scholar
Lindelius, H. (1980) Effects of parental consanguinity on mortality and reproductive function. Human Heredity 30: 185–91. [AHB]Google Scholar
Livingstone, F. B. (1969) Genetics, ecology, and the origins of incest and exogamy. Current Anthropology 10: 4561. [taPLvdB]Google Scholar
Lloyd, D. G. (1979) Some reproductive factors affecting the selection of self- fertilization in plants. American Naturalist 113: 6779. [MEL]Google Scholar
Lukianowicz, N. (1972) Incest. British journal of Psychiatry 120: 201–12. [taPLvdB]CrossRefGoogle ScholarPubMed
Lumsden, C. J. & Wilson, E. O. (1980) Gene-culture translation in the avoidance of sibling incest. Proceedings of the National Academy of Sciences 77: 6248–50. [taPLvdB]Google Scholar
Lumsden, C. J. (1981) Genes, mind, and culture. Harvard University Press. [GDF, FBL, CJL, tarPLvdB, EOW]Google Scholar
McLennan, J. F. (1865) Primitice marriage. Black. [taPLvdB]CrossRefGoogle Scholar
Maisch, H. (1972) Incest. Stein and Day.[taPLvdB]Google Scholar
Malinowski, B. (1927) Sex and repression in savage society. Paul, Trench, Trubner.[taPLvdB]Google Scholar
Malinowski, B (1929) The sexual life of savages. London: Routledge. ItaPLvdB]Google Scholar
Maquet, J. J. (1961) The premise of inequality in Ruanda. Oxford University Press. [taPLvdB]Google Scholar
Masters, R. E. L. (1963) Petterns of incest. Julian Press. [taPLvdB]Google Scholar
Mather, K. (1943) Polygenic inheritance and natural selection. Biological Reviews 18: 3264. [PB]CrossRefGoogle Scholar
Mauss, M. (1954) The gift. Cohen and West. [taPLvdB]Google Scholar
Maynard, Smith J. (1964) Group selection and kin selection. Nature 201: 1145-47. [taPLvdB]Google Scholar
Maynard, Smith J. (1978a) The evolution of sex. Cambridge University Press.[MEL, rPLvdB]Google Scholar
Maynard, Smith J. (1978b) The genetics of incest avoidlaisce. [MEL]Google Scholar
Maynard, Smith J. (1982) The evolution of social behaviour: A classification of models. In: Current problems in sociobiology, ed. King's College Sociolsiology Group. Cambridge University Press. [RD]Google Scholar
Mayr, E. (1963) Animal species and evolution. Harvard University Press. [taPLvdB]Google Scholar
Mayr, E. (1970) Populations, species, and evolution. Harvard University Press.[taPLvdB]Google Scholar
Mead, M. (1968) Incest. International Encyclopedia of time Social Sciences 7: 115–22. [taPLvdB]Google Scholar
Meiselman, K. C. (1978) Incest. Jossey-Bass.[KCM, taPLvdB]Google Scholar
Melotti, U. (1979) L'uomo tra natura e storia. La dialettica delle origini. Centro Studi Terzo Mondo/Penninsula. [UM]Google Scholar
Melotti, U. (1980) Towards a new theory on the origin of the family: Some lsypotheses on monogamy, polygyny, incest taboo, exogamy, and genetic altruism. Mankind Quarterly 21(2): 99133. [UM]Google Scholar
Melotti, U. (1981a) Sociobiologia e cultura. Nuove ipotesi su monogamia, esogamia, tabú dell'incesto e determinate forme di matrimonio privilcgiato. L'Uomo 5 (2): 347–77. [UM]Google Scholar
Melotti, U. (1981b) Towards a msew theory of the origin of the family. Current Anthropology 22:625–38. [UM]Google Scholar
Melotti, U. (1982) Sociobiologia e organizzazione sociale: nuove ipotesi sui rapporti di pareistela nelle società semplici. Rassegna ltaliana di Sociologia 23 (1): 113-42. [UM]Google Scholar
Middleton, R. (1962) Brother-sister and father-daughter marriage in ancient Egypt. American Sociological Review 27: 603–11. [taPLvdB]Google Scholar
Morgan, L. H. (1877) Ancient society. World. [taPLvdB]Google Scholar
Mundinger, P. C. (1980) Animal cultures and a general theory of cultural evolution. Ethology and Sociobiology 1: 183223. [GCW]Google Scholar
Murdock, G. P. (1949) Social structure. Macmillam. [JS, taPLvdB]Google Scholar
Murdock, G. P. (1957) World ethnographic sample. American Anthropologist 59: 664–87. [taPLvdB]CrossRefGoogle Scholar
Murdock, G. P. (1959) Africa: Its peoples and their culture history. McGraw-Hill. [rPLvdB]Google Scholar
Murdock, G. P. (1967) Ethnographic atlas. University of Pittslsurgh Press. [taPLvdB]Google Scholar
Murdock, G. P. (1972) Anthropology's mythology. Proceedings of the Royal Anthropological Institute of Great Britain and Ireland for 1971, pp. 1724. [taPLvdB]Google Scholar
Newsweek (1981) An epidemic of incest. Orlove, M. J. (1975) A Model of kin selection not invoking coefficients of relationship. Journal of Theoretical Biology 49: 289310. [RD]Google Scholar
Packer, C. (1979) Inter-troop transfer and inbreeding avoidance in Papio anubis. Animal Behaviour 27: 136.[RHB, taPLvdB]Google Scholar
Parker, S. (1976) The precultural basis of the incest taboo. American Anthropologist 73: 285305.[taPLvdB]Google Scholar
Parker, S. (1982) Rules, rituals, and behavior regulation.[RHB]Google Scholar
Parsons, T. (1954) The incest taboo in relation to social structure and the socialization of the child. British Journal of Sociology 5: 101–7.[JS]Google Scholar
Parsons, T. & Bales, R. F. (1955) Family, socialization and interaction process. Free Press.[taPLvdB]Google Scholar
Pribram, K. H. (1961) Implications for systematic studies of behavior. In: Electrical stimulation of time brain, ed. Sheer, D. E., pp. 563–74. University of Texas Press.[WJD]Google Scholar
Pribram, K. H. (1971) Lammguages of time brain: Experinmental paradoxes and principles in neuropsychology. Prentice-Hall. [WJD]Google Scholar
Price, M. V. & Waser, N. M. (1979) Pollen dispersal and optimal outcrossing in Delphinium nelsoni. Nature 277: 294–97.[MD]Google Scholar
Pusey, A. E. (1980) Inbreeding avoidlance in chimpanzees. Animal Behaviour 28: 543–52. [RHB, taPLvdB]Google Scholar
Radha, Rama Devi A., Appaji, Rao N. & Bittles, A. H. (1982) Inbreeding in the State of Karnataka, South India. Human Heredity 32: 810. [AHB]Google Scholar
Rao, P. S. S. & Inbaraj, S. G. (1977a) Inbreeding effects on human reproduction in Tamil Nadu of South India. Annals of Human Genetics 41:8798. [AHB]CrossRefGoogle Scholar
Rao, P. S. S. & Inbaraj, S. G. (1977b) Inbreeding in Tamil Nadu, South India. Social Biology 24: 281–88. [AHB]Google Scholar
Rao, P. S. S. & Inbaraj, S. G. (1979a) Inbreeding effects on fertility and sterility in Southern India. Journal of Medical Genetics 16: 2431.[AHB]Google Scholar
Rao, P. S. S. & Inbaraj, S. G. (1979b) Trends in Isuman reproductive wastage in relation to long-term practice of inbreeding. Annals of Humnan Genetics 42: 401–13. [AHB]Google Scholar
Rao, P. S. S. & Inbaraj, S. G. (1980) Inbreeding effects on fetal growth and development. Journal of Medical Genetics 17: 2733. [AHB]Google Scholar
Reid, R. M. (1973) Social structure and inbreeding in a South Indian caste, In: Genetic structure of populations, ed. Morton, N. E., pp. 9299. University of Hawaii Press. [AHB]Google Scholar
Richards, A. L. (1939) Land, labour, and diet in Northern Rhodesia. Oxford University Press. ]taPLvdB]Google Scholar
Richerson, P. J. & Boyd, R. A. (1978) A dual inheritance model of the human evolutionary process. I. Basic concepts and a simple model. Journal of Social and Biological Structures 1: 127–54. [DGF, taPLvdB]Google Scholar
Romner, A. S. (1968) The procession of life. World Publishing. ]LT]Google Scholar
Romney, A. K. & Epling, P. J. (1958) A simplified model of Kariera kinship. American Anthropologist 60: 5974. [FBL]CrossRefGoogle Scholar
Rush, F. (1980) The best kept secret. Prentice-Hall. ]taPLvdB]Google Scholar
Ruse, M. (1981) What kind of revolution occurred in geology? In: PSA, 1978, 2, ed. Hacking, I.. Philosophy of Science Association. [MR]Google Scholar
Ruse, M. (1962) Darcinism defended: A guide to the evolution controversies. Addison-Wesley. ]MR]Google Scholar
Sade, D. S. (1968) Inhibition of son-mother mating among free-ranging rhesus monkeys. Science and Psychoanalysis 12: 1838. [RHB, taPLvdB]Google Scholar
Sade, D. S., Cheverud, J., Chepko-Sade, D. & Rhodes, D. (1981) Are monkey societies products of group selection? Paper presented at Symposimum of Human Sociobiology, Northwestern University. [DGF]Google Scholar
Sanford, L. T. (1980) The silent children. Doubleday. ]taPLvdB]Google Scholar
Sanghvi, L. D. (1966) Inbreeding in India. Eugenics Quarterly 13: 291301. ]AHB]Google Scholar
Santos, Frei Joao dos (1609) Eastern Ethiopia. Translated extracts reprinted in Records of South-Eastern Africa, ed. Theal, G. Mc., 7: 1370. Struik, 1909. [CSL]Google Scholar
Schebesta, P. (1926) Die Zimbabwe-kultur in Afrika. Anthropos 21: 484545. [CSL]Google Scholar
Schneider, D. M. (1976) The meaning of incest. Journal of the Polynesian Society 85: 149–69. [taPLvdB]Google Scholar
Schull, W. J. & Neel, J. V. (1965) The effects of inbreeding on Japanese children. Harper and Row. [AHB]Google Scholar
Schull, W. J. & Neel, J. V. (1972) The effects of parental coissanguinity and inbreeding in Hirado, Japan. V. Summary and interpretation. American Journal of Human Genetics 24: 425–53. [AHB]Google Scholar
Scemanova, E. (1971) A study of children of incestuous matings. Human Heredity 21: 108–28. [AHB, FBL, tarPLvdB]Google Scholar
Seligman, B. A. (1929) Incest and descent: Their influence on social organization. Journal of the Royal Anthropological Institute 59: 231–72. [JS]Google Scholar
Seligman, B. A. (1950) lncest and exogamy, a reconsideration. American Anthropologist 52: 305–16. [taPLvdB]Google Scholar
Shepher, J. (1971a) Mate selection among second generation kibbutz adolescents and adults: Incest avoidance and negative imprinting. Archives of Sexual Behavior 1: 293307. [PB, taPLvdB]Google Scholar
Shepher, J. (1971b) Self-imposed incest avoidance and exogamny in second generation kibbutz adults. University Microfilms. [JS]Google Scholar
(in press) Incest: A biosocial view. Academic Press. [JS. taPLvdB]Google Scholar
Sherman, P. (1980) The limits of ground squirrel nepotism. In: Sociobiology:Beyond nature/nurture?, ed. Barlow, G. & Silverberg, J., pp. 505-44. Westview Press. [RHB]Google Scholar
Spielman, R. S., Neel, J. V. & Li, F. H. F (1977) Inbreeding estimation from population data: Models, procedures and implications. Genetics 85: 355–71. ]FBL]Google Scholar
Spiro, M. E. (1956) Kibbutz: Venture in utopia. Harvard University Press. ]taPLvdB]Google Scholar
Spiro, M. E. (1958) Children of the kibbutz. Harvard University Press. [taPLvdB]Google Scholar
Spiro, M. E. (1979) Gender and culture: Kibbutz women revisited. Duke University Press. ]taPLvdB]Google Scholar
Stine, G. J. (1977) Biosocial genetics. Macmillan. [taPLvdB]Google Scholar
Temerlin, M. K. (1975) My daughter Lucy: Puberty of a chimpanzee. Psychology Today 9: 5962, 103. [taPLvdB]Google Scholar
Tiger, L. (1979) Optimism: The biology of hope. Simon & Schuster. ]LT]Google Scholar
Tiger, L. & Fox, R. (1971) The imperial animal. Holt, Rinehart and Winston. [taPLvdB]Google Scholar
Tiger, L. & Shepher, J. (1975) Women in the kibbutz. Harcourt Brace Jovanovich. [taPLvdB]Google Scholar
Trivers, R. (1971) The evolution of reciprocal altruism. Quarterly Review of Biology 46: 3557. [taPLvdB]Google Scholar
Tylor, E. B. (1888) On a metlsod of investigating the developmemst of institutions. Journal of the Royal Anthropological Institute 18: 245-69. ]taPLvdB]Google Scholar
van den Berghse, P. L. (1960) Hypergamy, hypergenation and miscegenation. Human Relations 13: 8391. [rPLvdB]Google Scholar
van den Berghse, P. L. (1978) Man in society. Elsevier. [tarPLvdB]Google Scholar
van den Berghse, P. L. (1979) Human family systems: An evolutionary view. Elsevier. [tarPLvdB]Google Scholar
(1980) Incest and exogamy: A sociobiological reconsideration. Ethology and Sociobiology 1: 151–62. [tarPLvdB]Google Scholar
(1981) The ethnic phenomenon. Elsevier. ]rPLvdB]Google Scholar
(1982) Incest taboos and avoidance: Somne African evidence. ]taPLvdB]Google Scholar
van den Berghe, P. L. & Mesher, G. (1980) Royal incest and inclusive fitness. American Ethnologist 7: 300317. [CSL, PKS, tarPLvdB]Google Scholar
Wade, M. J. (1978) A critical review of the models of group selection. Quarterly Review of Biology 53: 101–14. [DGF]Google Scholar
Weinberg, S. K. (1955) Incest behavior. Citadel. [taPLvdB]Google Scholar
Westermarck, E. A. (1891) The history of human marriage. Macmillan. [MD, WJD, MEL, MR, taPLvdB]Google Scholar
Wexler, K. & Culicover, P. (1980) Formal principles of language acquisition. MIT Press. [CJL]Google Scholar
White, L. A. (1948) The definitiois and prohibition of incest. American Anthropologist 50: 416–35. [CJL, taPLvdB]Google Scholar
(1949) The science of culture. Farrar, Straus & Girous. [WI]Google Scholar
Williams, G. C. (1966) Adaptation and natural selection. Princeton University Press. [DGF]Google Scholar
Wilson, D. S. (1980) The natural selection of populations and communities. Benjamin/Cummings Publishing Co. [DGF]Google Scholar
Wilson, E. O. (1975) Sociobiology: The new synthesis. Harvard University Press. [PB, FBL, taPLvdB]Google Scholar
Wilson, E. O. (1978) On human nature. Harvard University Press. [taPLvdB]Google Scholar
Wolf, A. P. (1966) Childlsood association, sexual attraction, and the incest taboo: A Chinese case.American Anthropologist 68: 883–98. [WJD, taPLvdB]Google Scholar
(1968) Adopt a daughter-in-law, marry a sister. American Anthropologist 70: 864-74. ]WJD, taPLvdB]Google Scholar
Wolf, A. P. (1970) Childhood association and sexual attraction: A further test of the Westermarck hypothesis. American Anthropologist 72: 503–15. [WJ D, taPLvdB]Google Scholar
Wolf, A. P. & Huang, C. (1980) Marriage and adoption in China, 1845–1945. Stanford University Press. [taPLvdB]Google Scholar
Wright, S. (1933) The roles of mutation, inbreeding, crossbreeding and selection in evolution. Proceedings of the Sixth International Congress of Genetics, ed. Jones, D. F., vol. 1, pp. 356–66. Brooklyn Botanic Garden. [PB]Google Scholar
Yerushalmy, J. (1938) Neonatal mortality by order of birth and age of parents. American Journal of Hygiene 28: 244–70. [AHB]Google Scholar