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388 pages, Paperback
First published December 3, 2003
One might argue that in the absence of a motivation to aggress, as is the case in all those animal and plant species that lack consciousness, genetic replacement presents no moral problem. And since humans generally are not aware of genetic interests, perhaps there is nothing immoral about one person or group’s genes replacing others’. Morality would only become involved if the process of gene replacement entailed aggressive motives or fear or perceived loss on the part of the losers, and it would be these motives and fears that would raise moral issues, not the genetic effects. This argument leaves considerable room for ethical considerations since gene replacement is often achieved by aggressive acts motivated by intention to harm or callousness towards victims, including violent conquest, territorial displacement, and deception. Even if genetic conquest is unaccompanied by aggressive intent, an ethical issue still arises if the conquered suffer physically or emotionally in the process. Also, it is not true that humans are completely unaware of genetic interests. As noted in Chapter 6, all societies have cultural substitutes, often kin metaphors that serve emotionally to tag family, clan, and ethny. As knowledge of genetic interest spreads there will be fewer excuses for aggressing against those interests and perhaps greater resistance by victims, making the process of genetic replacement ever more ethically problematic. Furthermore, it is not absolutely clear that morality resides only in motives, since ethics can involve evaluating situations as well as apportioning blame. An observer might not blame a winning group for replacing another group’s genes, but still consider the fact of replacement morally objectionable and thus something to prevent or reverse if possible. (p. 313)
If the non-white minority continues to grow at the high end of its 2-4 percent annual growth rate reported since 1950, whites will be in the minority in the British Isles by 2100. On current trends, whites will be in the minority in London by 2010. The Dutch port city of Rotterdam has a population of 540,000 people, 45 percent not of Dutch descent. If present trends continue the Hague will be minority Dutch by 2020 and Israelis of Jewish descent will become a minority in Israel by about 2030 due to higher Arab fertility and immigration in the family reunion category. ("Immigration and Ethnic Genetic Interests", p. 61)
The family analogy again helps clarify the issue. Recall from Chapters 2, 3, and 5 that an ethny is usually a large store of genetic interest homologous to that residing in families, though often at a lower concentration. Both groups are large stores of genetic interest for their members. Genetically, directing members’ loyalty away from their ethnies is equivalent to directing parents’ loyalties away from their children. … Sentimental interests are also damaged since such acts tend to break or prevent the formation of meaningful prosocial relationships. The contemporary intellectual emphasis on the evils produced by ethnic sentiment should not blind us to the positive role of ethnicity in providing a sense of belonging, social cohesion, and continuity. Whether ultimate or proximate interests are considered, turning individuals away from their ethnies is aggressive in effect, and if done with knowledge of genetic or sentimental interests, also in intent. It would seem to be immoral on that basis. (p. 305)
The number of copies of an individual’s distinctive genes. These are most concentrated in the individual, then in first degree relatives, thence in decreasing concentration to clan, tribe or ethny, geographic race, and species. In terms of population genetics, genetic interest can be quantified as aggregate kinship, as an equivalent number of children or other close kin. (p. 339 - 340)
The small groups that left Africa to colonize the world were almost certainly bands comprised of closely related individuals, and thus genetically differentiated to some degree from the remainder of the species. According to theory expounded by Cavalli-Sforza himself, genetic drift within these small bands would have rapidly increased the genetic difference between and the kinship within them. That is without factoring in selective force of changed environment. Consistent with this time scale, E. O. Wilson has argued that microevolution of human populations can occur within 1000 years, major adaptations taking perhaps 2000 years, and speciation 40,000 years. ("Concentrations of Kinship", p. 48)
It is uncontroversial that individuals' distinctive genes are concentrated within their families. The proportion of shared genes, denoted by r (for relatedness) in Hamilton's original formulation, declines by 50% for each generational step. An individual shares half his or her genes with each offspring, a quarter with each grandchild, an eighth with first cousins, and so on. The formula for calculating r between two individuals is simply half raised to the power of the number of generational steps n separating them. ("Concentrations of Kinship", p. 38).
Hamilton developed inclusive fitness theory using the coefficient of relatedness r, being the proportion of genes identical by descent shared by two individuals. [The genetic evolution of social behavior, parts 1 and 2. Journal of Theoretical Biology, 7, 1-51] Subsequently quantitative genetic theorists replaced r with the coefficient of kinship f because of the latter’s greater precision. (p. 344)
The coefficient of kinship between two diploid organisms describes their overall genetic similarity to each other relative to some base population. For example, kinship between parent and offspring of 1/4 describes gene sharing in excess of random sharing in a random mating population. In a subdivided population the statistic Fst describes gene sharing within subdivisions in the same way. Since Fst among human populations on a world scale is reliably 10 to 15 percent, kinship between two individuals of the same human population is equivalent to kinships between grandparent and grandchild or between half siblings. (p. 327)
Here is the definition of kinship between person x and person y: pick a random gene at a locus from x and let the population frequency of this gene by p. Now pick a gene from the same focus from y. The probability that the gene in y is the same as the gene picked from x, Py is Py = Fxy + (1 - Fxy)p … For example, pick a gene from me, then pick another gene from the same locus from me. With probability 1/2 we picked the same gene, while with probability 1/2 we picked the other gene at that locus. Therefore the probability that the second gene is the same as the first is just 1/2 + p/2, and substitution of this conditional frequency in the formula for kinship shows that my kinship with myself is just 1/2. The same reasoning leads to the well known values of 1/4 with my child, 1/8 with my grandchild, my half-sib, or my nephew, and so on. (p. 328)
Many studies agree that Fst in world samples of human populations is between ten and fifteen percent. If small long-isolated populations are included, the figure is usually somewhat higher. A conservative general figure for our species is Fst ~ 0.125 = 1/8. This number was given by Cavalli-Sforza in 1966, and a widely cited paper by Lewontin (1972) argued at length that this is a small number, implying that human population differences are trivial. An alternative perspective is that kinship between grandparent and grandchild, equivalent to kinship within human populations, is not so trivial. (p. 330)
The plausibility of the analogy between duty to family and tribe is greatly strengthened by the fact that tribal duty has been the norm throughout human history and prehistory. Only those who accept a secular doctrine of original sin could contemplate the notion that humans have been evil for all of their existence and have only become pure in the last decades in a few benighted countries. It is more rational to assume that the absence of ethnic duty is a bold experiment, possibly an immoral one. (p. 303)
Perhaps the family analogy can be taken further. It is parents’ duty to care for their children. Do we have a similar duty to nurture our ethnies? Such a duty would imply that it is morally right to defend one’s ethny. It would also mean that fellow ethnics could be held accountable for their actions towards the ethnic family, similarly to family members being considered to have acted improperly when they failed to aid kin. The logic for asserting both family and ethnic duties is the same, and derives from the nature of genetic interests. An individual who fails to help a family member in time of need or who directs scarce resources towards nonkin harms the jointly-held genetic interests of the whole family. The same is true with ethnies. (p. 302)
While utopian socialists such as the early Bolsheviks and the Israeli kibbutz movement have tried to abolish the nuclear family and the parental favoritism it involves, attempts to redirect parental investment to nonkin have usually given way to popular demand; parental favoritism remains almost universally accepted. This inevitably contributes to inequality among children but nevertheless the parental bond is so strong that this primary form of discrimination is considered morally unexceptional. (p. 301)