II. YALE AND THE EARLY YEARS

During the Progressive Era eugenics attracted considerable support from respected scholars, reformers, and educated elites as a scientifically grounded attempt at large-scale social engineering. In commenting on the popularity of eugenics among university circles, Hamilton Cravens (Reference Cravens1988, p. 53) observed: “Eugenics rocketed through academia, becoming an institution virtually overnight. By 1914, some forty-four major institutions offered eugenic instruction. Within a decade, the number would swell to hundreds, reaching some 20,000 students annually.” If it is true that Harvard was more central to American eugenics than any other university (Cohen Reference Cohen2016), Yale was only slightly less influential. In this connection, suffice it to say that three of the first seven presidents of the American Eugenics Society came from Yale—the foremost economist Irving Fisher (1922 to 1926), sociologist Henry Pratt Fairchild (1929 to 1931), and geographer Ellsworth Huntington (1934 to 1938).Footnote ³ Henry Farnam, who served as president of the American Economic Association in 1911, was another Yale figure who more than flirted with eugenic ideas (Farnam Reference Farnam1908; Leonard Reference Leonard2016) and who was involved with Fisher in the activities of the eugenics-oriented Life Extension Institute. These men, and others who won’t be mentioned here, were personally connected, and all of them adopted eugenic arguments in their discussion of racial distinctions, social degeneration, and immigration restriction.Footnote ⁴ Keller was part of this network. He knew Fisher well and Fisher referred to Keller’s works in his survey of eugenic literature for the National Conservation Commission (Reference Fisher1909). Keller was a personal friend of Fairchild, and in the preface of Societal Evolution (Reference Keller1915 pp. viii–ix) he thanked him for his “especially enlightening criticisms and suggestions.”Footnote ⁵ Keller also worked closely with Huntington and contributed to the geographic offering at Yale as one of the three co-teachers of the course on Physical and Commercial Geography (Martin Reference Martin1973). In addition, it is significant that Keller’s early efforts in support of eugenics all appeared in the Yale Review, which included among its editors both Farnam and Fisher.

The few attempts to place Keller within the broader context of Progressive Era social science (Barnes Reference Barnes1948; Odum Reference Odum1951; Cravens Reference Cravens1971; Bannister Reference Bannister1987) include him among the prominent members of the second generation of American sociologists—that of Charles H. Cooley, Charles A. Ellwood, Edward C. Hayes, Edward A. Ross, and William I. Thomas, just to name a few. Yet, in spite of his notoriety, Keller’s interactions with his contemporaries were minimal, if not completely absent. Throughout his career he had no relevant academic exchange with any of his fellow sociologists, and his works were only passingly reviewed in the academic press and generally by minor figures in the field.Footnote ⁶ “Keller would have nothing to do with sociology or the American sociological Society,” notes Howard W. Odum in this regard, and much of his “solitary efforts” were devoted to “seeing that Sumner’s contributions were preserved and published with an incomparable loyalty and fidelity to Sumner, both personally and professionally” (Odum Reference Odum1951, p. 117). Keller’s extraneity with respect to American sociology may have been due to his own personal and academic idiosyncrasies, but also, and more plausibly, to the fact that his close intellectual association with Sumner earned him the same kind of professional ostracism that had been reserved to his mentor. The latter view is somehow supported by the evidence that Keller came immediately to be seen as the most authoritative interpreter—or even the only exegete—of Sumner’s work. In this connection, a founding father of the discipline in America, Albion Small (Reference Small1916, p. 732n3), wrote (not without a touch of irony) that “it is hoped that Keller will be able to interpret [Sumner] in such a way that students of the history of sociology a century hence will see him in a different perspective from that in which he appeared to his contemporaries.”Footnote ⁷ Albeit the most conspicuous, however, Sumner was not the only important formative influence on Keller’s thought. Since his very early essays, and this is what mostly concerns us here, Keller revealed a keen admiration for Francis Galton and his eugenics, the science that he had officially launched in 1893.

The first traces of Keller’s biological determinism surface in his early discussion of imperialism and the so-called native question, the problems faced by an expanding nation in dealing with the conquered populations. Despite his vigorous critique of some contemporary colonial experiences, such as Italy’s (Reference Keller1900b) and France’s (Reference Keller1901), Keller favored colonial policies that expanded Western systems of labor and commerce to the “lower races,” though based on a coercive paternalism that left little room for individual rights. “The natives are grown-up children and must be so treated,” Keller sentenced (Reference Keller1903b, p. 264).Footnote ⁸ For the Anglo-Saxon settlers in the tropics, the main problem with them was that no inducements to uncoerced labor had any attraction “except those which the Europeans were unwilling to give” (p. 266). Natural indolence and “lack of foresight” soon produced widespread vagabondage, so that “the wage-system was given no chance” (p. 267). It is then evident, he ventured (p. 268), that “slavery has been … the first and thus far the best means of developing the tropics.” Where individuals are not responsive to economic incentives, compulsion becomes necessary, for “the exigencies of trade do not allow of waiting for the backwood native to develop into a modern European.” This would be a long wait, Keller continued, and “the suspicion enters the mind of one who has studied the lower races of the tropics that, so far as they are concerned, it can never be.”Footnote ⁹

Ultimately, Keller adhered to the commonly held late nineteenth-century view that all “primitive” or “savage” races around the world were doomed sooner or later to extinction in the face of a superior European stock. As he put it:

As to whether education can succeed in uplifting the natives to the level of the Europeans from virtual extinction, Keller did not take a definite position. He did assert that “education should strive to make of the native … a useful economic factor” (Reference Keller1903b, p. 273), but in the same passage he specified that this would save them only “temporarily” from “virtual extinction.”

Interestingly, Keller returned to the effects of education in 1907, in a brief note where he contrasted the recently published views of Lester Ward (Reference Ward1906) with those of Galton. Both men, he noted, hold that the “race” is to be improved by its great men or “geniuses.” The difference is that whereas Galton would breed from a selected elite so to accumulate hereditary high qualities, and is, therefore, “oligocentric” in his attitude, Ward is “egalitarian,” in the sense that he believes in human equality and puts stress on the extension of educational opportunities. This time Keller’s stance was unequivocal. He was willing to recognize the importance of luck, or privilege, to the life of an individual, yet he considered several reasons that make it “scarcely possible to minimize the influence of heredity” (Reference Keller1907, p. 195). First, he explained, anyone who still admits the inheritance of acquired characters could not accept Ward’s position. Second, according to Keller (p. 196), Ward himself could deny that many of the opportunities he considers “may have been attracted to the neighborhood of the budding genius by reason of his being so.” Third, and let us quote Keller at length here, he considered it hard for the trained anthropologist to share the belief in the equality of the various races. As an example, he questioned the faith in “potentiality of genius of the English or French type among Papuans and Fijians,” so that “if the latter were caught young and loftily ‘nurtured’ there might arise a Beethoven with a simian facial angle or a Goethe with ‘forehead villainous low’” (Reference Keller1907, p. 196). Finally, Keller observed that over the last decades educational opportunities had been assured to almost every segment of society, and this should soon result, if Ward is right, in a “crop” of geniuses. Evidence does not point that way, Keller concluded, but rather to a “dissoluteness of social and ethical virtues, consequent upon too much freedom and too little discipline” (p. 196).

Keller expanded on these themes in a paper significantly titled “Eugenics, the Science of Rearing Human Thoroughbreds” (1908b) and in two subsequent contributions (Reference Keller1910 and Reference Keller1914). Here he continued in his passionate endorsement of eugenics, devoting much space to a detailed discussion of August Weismann’s rejection of the inheritance of acquired characteristics.Footnote ¹⁰ By embracing Weismannism, as he called it, Keller could challenge the environmental reform impulse of Neo-Lamarckism and infuse his eugenics with a heavy dose of determinism.Footnote ¹¹ This time, however, Keller also called attention to a difficulty inherent to the reform program advocated by Galton. With respect to the animal breeder, he wrote, the eugenists must face a completely different set of difficulties—“[n]o agency makes it its business to guarantee apt mating; no stern hand holds the issues of life and death, steadily eliminating the less fit; no directing mind works its material toward a type or ideal of development” (1908b, p. 129). Keller admitted that over the years several laws had been designed to control human mating and, as in the case of forced sterilization, the right to reproduce of certain individuals. This, however, is but the “crudest form of control,” and one that is largely ineffective. A more efficient kind of authority, he suggested, can be exercised through “custom, precedent, and prejudice,” all factors whose action is far more “penetrating and intimate” than any formal law can ever be. It is clear enough to the sociologist, Keller affirmed, that if eugenics is to be supported by feeling, apart from intellect, it must be absorbed into the folkways of a group—i.e., into that “body of customs and habitudes which come to be lived up to most instinctively” (p. 151). Keller will come back to this specific point in his Societal Evolution.

III. SOCIETAL EVOLUTION

Keller’s magnum opus, Societal Evolution, appeared in 1915. In the opening pages of the volume, the author made crystal clear his inspirational principle: “I have come to believe that the Darwinian factors of variation, selection, transmission, and adaptation are active in the life of societies as in that of organisms” (Keller Reference Keller1915, p. vi). This plain statement has led some interpreters (Hofstadter Reference Hofstadter1944; Bannister Reference Bannister1979; Hodgson Reference Hodgson2004) to enroll Keller among the social Darwinists of the period—an association that Keller would have not fully appreciated. As he saw it, “social Darwinism” (he used the exact term) was a vague term encompassing an indiscriminate range of social approaches with often little resemblance to Darwin’s original theories. Keller mentioned John B. Haycraft, David G. Ritchie, Benjamin Kidd, and Walter Bagehot as authors who had explored in distinct ways the nexus between evolution and the study of society.Footnote ¹² While he found these contributions “useful and admirable,” he could not see that “any of these has succeeded in lending to social science anything akin to the practical benefits enjoyed by natural science as the result of the development of Darwinism” (p. 11). Keller’s discontent toward Herbert Spencer, whom he considered an “untrustworthy guide” (p. 8) was argued in a more explicit manner. To Keller’s eyes, Spencer’s contention that societies evolve from incoherent homogeneity to coherent heterogeneity was just pseudo-science—an intrinsically normative judgment that has led many students to “identify evolution with progress” (p. 8). Darwin only spoke of adaptation, Keller objected, “a basic idea which could be defined objectively, as progress cannot” (p. 9). What is necessary, then, is to extend Darwinian evolution into the social world without sacrificing its original significance. To do so, one must go beyond the simple “reasoning by analogy” so typical of those contemporary writers who have felt under the “spell of Spencer.” Societal evolution is real evolution and the Darwinian factors of variation, selection, and transmission “have their societal mode as they occur in the life of society, just as they have their organic mode when they appear in the life of organisms” (pp. 15–16).

A main innovation in Keller’s own brand of social Darwinism was the explicit recognition that the units of replication or selection could be social entities such as customs and institutions, rather than individuals or a group of individuals alone (Hofstadter Reference Hofstadter1944; Bannister Reference Bannister1987; Hodgson Reference Hodgson2004). The relative stability and durability of what Sumner had called “folkways” make them key objects of evolutionary selection in the socio-economic realm. These folkways, Keller wrote, constitute “the connecting idea between organic and societal evolution” (p. 30), in the sense that they are “a natural and essential societal form” that is “analogous to the germ or embryo” (p. 31). Keller followed his mentor, almost verbatim, in distinguishing between folkways and mores. Folkways are those habits and customs that represent the “lowest terms” or “matrix of the institutions.” They are mostly “made unconsciously,” and once established they form a consistent system of norms developed under the “stimulus of need” (p. 51). When certain folkways become the object of universal group approval and are taken to be the “embodiment of its prosperity policy” (p. 51), they become mores. As in organic life, variation exists among the folkways and mores of individuals and social aggregates. Here, somehow ambiguously, Keller established a nexus between social variation and organic changes in the brain. “It must not be forgotten,” he affirmed (p. 51), that “[variation in the folkways] probably go back to physical change in the individual brain, and so root in organic processes and organic evolution.” This correspondence has important consequences for the social scientist—“[i]f races cannot yet be classified as a result of the study of the cerebrum itself, they can be classified on the criterion of the activity of that organ, as displayed in the sum of materialized or realized ideas” (p. 19). As to the sources of variation, Keller’s discussion is somehow sketchy and superficial. Spontaneous or unconscious variation, he maintained (p. 44), occurs in a “random and inconsequent” fashion and generally implies only “slight departures” from the prevailing mores. Conscious variation, or experimentation, is instead a process based on law and scientific knowledge, but it is often as “clumsy and floundering” (p. 47) as its spontaneous counterpart. In the end, Keller wrote, “the fact of variation in the folkways is all that needs to be established here” (p. 48).

Selection acts upon variations and occurs in one of two ways: it is either “automatic” or “rational.” Automatic selection is a gradual, mostly unconscious, process whereby folkways are crystallized into mores, before being formalized into formal rules. Following Sumner, Keller used the normative regulation of marriage as an example of automatic institutionalization. By contrast, rational selection is always conscious, deliberate, and “performed in the light of knowledge” (p. 96). Keller, however, assumed that rational and irrational elements always coexisted in social processes. Even enlightened rational selection is “precarious” and “full of error,” he stated (p. 98), for “where the human mind comes in there are sure to be wrong valuations due to imperfect knowledge and to bias of various kinds.” Therefore, “it cannot be asserted that rational selection prevails in any comprehensive degree throughout the evolution of even the most civilized societies” (p. 114). The question now arises as to what elements of society engage, consciously and unconsciously, in the selection of folkways and mores. In this regard Keller followed Sumner again and distinguished between the “classes,” by which he meant the higher social strata, and the “masses.” The latter are the traditional and conservative core of society, and thus represent an inertial force in society, while the classes are the source of variation and change. As Sumner (Reference Sumner1906, p. 47, quoted in Keller Reference Keller1931, p. 97) had put it in his Folkways: “[i]t is the classes who produce variation; it is the masses who carry forward the traditional mores.” Like his mentor, Keller held that the masses are the main problem for the construction of an authentic liberal democracy.Footnote ¹³ Exploitation of class feelings of millions of ignorant voters by “demagogue” politicians would set the masses against the wealthier classes and exacerbate antagonistic feelings, threating the very functioning of democracy. This line of argument, however, should not be carried too far. Although Keller remained unconvinced the masses possess the deliberative abilities needed to yield an effective democratic government, he never denied the virtues of an egalitarian state. Nowhere did he imply that the masses must passively accept the decisions imposed by the dominant classes. As Keller wrote in the second edition of Societal Evolution, “the elimination of persistence of the mores is determined by the action of men in masses” (Reference Keller1931, p. 141). Once the higher classes have selected certain social variations, it is only through the masses’ consensus that these become incorporated into the prevailing folkways and mores of society. “In short perspective,” Keller elaborated (Reference Keller1931, p. 72), “the lodgment of power in a few individuals, or even in one autocrat, seems to attain an efficiency toward which a democracy vainly strains.” And yet, he concluded, “to go back to a monarchical system would be to return to a superseded societal form.”

At this point, we find in Keller a further element of ambiguity. On the one hand, he claimed that the masses lack the necessary social capital, in modern jargon, to become innovators. In his words: “the dominating class has a better chance than the rest to get knowledge upon which to base a rational selection. It is better educated” (Reference Keller1931, p. 116). On the other hand, as noted by Sanderson (Reference Sanderson2007, p. 90), Keller’s insisted reference to the “inferior” intelligence or “endowment” of the lower social strata seems to imply a conviction that the masses lack not only the knowledge but also the mental power to lead the process of change. This interpretation is supported by what Keller had written in his earlier eugenic essays, where he accepted, with some mild caution, the eugenists’ claim of a general correspondence between an individual’s social status and his biological superiority:

The dominant classes also play a crucial role in the transmission of folkways and mores. Once selection has been made, Keller asserted, the successful variations are transmitted to future generations by means of inculcation and imitation.Footnote ¹⁴ Inculcation includes education broadly conceived, and represents the “inmixture of the human mind” (Reference Keller1915, p. 218), acting consciously and with some end in view. Imitation, instead, is the “automatic” process through which the masses adopt the mores of the leading groups. Inculcation and imitation, Keller (p. 235) noted, are hardly distinguishable—"inculcation in all its forms rests ultimately upon imitation, which is the dominant means of transmission of the mores.” This makes transmission a top-down, inherently hierarchical, process where the masses play only a subordinate role as receptors of customs and mores in contrast to those who have “control over the policy of the society” (p. 116).Footnote ¹⁵

Keller’s exposition of societal evolution in Darwinian terms is thus complete. Evolution, he wrote in a later contribution, is “the development of form out of form, in a connected series, with survival of the fitter forms in adjustment to environment” (Reference Keller and Baitsell1922, p. 126). In the social field, variation in the mores offers different degrees of “fitness,” and conflict deriving from the struggle for self-maintenance results in the social selection of those mores that promote better adaptation. These variations are then transmitted to future generations through education and imitation. Keller added two Important (and closely related) qualifications to his social evolutionism. First, he recognized that path dependence in the establishment of mores can lead to specific instances of institutional persistence and structural inertia (Fiorito and Vatiero Reference Fiorito and Vatiero2023). Social selection, he speculated (Reference Keller1915, p. 49), cannot keep pace with the “production of that upon which it is to operate,” and so “the unfittest variations are not eliminated with the expedition characteristic in nature.” This is due to the fact that when mores become crystallized into institutions, they produce numerous “inferences” or “corollaries,” which cannot always be changed or eliminated, along with their “supporting principle.” Second, Keller contended that efficient adaptation occurs only with respect to the mores of self-maintenance, and this is because the “nearer the mores come to the struggle for existence [the] more vivid is the demonstration of their expediency or inexpediency” (p. 132). Here we find Keller advancing a sort of “cultural lag” à la Ogburn (Reference Ogburn1922), according to which “secondary” societal structures adjust to the maintenance mores, usually with a certain delay, but they are not themselves direct adaptations to environmental conditions. Keller made his point with a telling metaphor: “the code of the maintenance organization is the dominant chord vibrating to the tone of the struggle with nature and fellow-man; the rest of the mores are, as it were, overtones of that chord” (Reference Keller1915, p. 160).

IV. KELLER ON EUGENICS

Keller did not consider societal and natural, i.e., biological, evolution as completely unrelated. Natural selection, he said, “develops the man-animal with specialized mental adaptability” (Reference Keller1915, p. 68), and is more intense in those primitive groups living in direct contact with nature. As civilization advances, the environment becomes increasingly artificial and the folkways and mores emerging from the process of adaptation operate to “exempt man from natural forms of selection.” This is done through the action of societal selection, which “spares those who would not be spared under nature” (p. 68)—a process Keller called “counterselection.” As he clarified, “[i]t is possible to take one point of view according to which, starting with natural selection, we seem to proceed by inevitable transitions straight to its opposite.” Drawing upon the literature of his time, mostly from the work of the German eugenist Wilhelm Schallmayer (Reference Schallmayer1903), Keller listed several specific instances of counterselection. First, he joined the chorus of those, like his Yale colleague Fisher, who opposed war because it selected for the unfit. With the advent of modern warfare and firearms, Keller wrote, the war had lost its original selective power, in which the weakest elements were eliminated, becoming an agent of counterselection: “[t]he best are exposed to danger, while the inferior do not see the enemy; and, even among the best, the superior man physically—the strongest, the fleetest—has little better chance of survival than his inferiors. All are ‘food for the bullets’” (p. 171). War is also counterselective in that it produces a large number of belated marriages, with a consequent shrinking of the family size among the fittest. To this Keller added that the soldier “is not infrequently demoralized for the rest of his life,” and that “his children are likely thereby to suffer some diminution of opportunity, or even some positive and vital harm” (p. 172).

Another important agency of counterselection was the modern industrial organization, which does not call for the “biologically fitter.” With the advent of scientific management and assembly line production, Keller speculated, the worker is reduced to a machine and “certain relatively low human activities become the object of selection” (Reference Keller1915, p. 173).Footnote ¹⁶ Again, following Galton almost verbatim, Keller argued that the inheritance of wealth, combined with the rule of primogeniture, operated to “throw all the opportunities of early marriage, possession of a large family, and the like, in the way of the less fit” (p. 173). The development of therapeutics, hygiene, and the technique of nutrition were also seen as biologically wasteful—to the extent that “they rear up to the age of maturity and of procreation many who formerly fell early beneath the sweep of natural selection” (p. 174). Charity and poor relief were condemned for their “individualistic tendency of humanitarianism,” an approach that conceded no interest to society and acted against the “elimination of those who are losing in the conflict” (p. 175). Finally, to complete his compendium of dysgenic themes, Keller drew attention to the differential fertility of different social classes within the United States and expressed alarm that the individuals in whom society recognizes a “superior value” are reproducing at a lower rate than those who “have little more than their bodily strength to put into the social stock of power” (p. 186). This tendency, Keller predicted, means a slower growth of the “highly equipped” class, until its final disappearance by what, following the then popular trend, he called “race suicide.”

Keller’s overall appraisal of the consequences of counterselection reveals the typical ambivalence of much Progressive Era social science. Swinging like a pendulum, Keller first affirmed that man is an animal, subject to the laws of nature, and as such he “can never ignore biological qualities altogether, cut loose once and for all from the earth” (Reference Keller1915, p. 178). Accordingly, “[i]t would be dangerous indeed if societal selection were going to become unreservedly counterselective.” In a following passage, Keller (p. 182) changed tone and this time he pointed out that many of the counterselective factors he had discussed are inevitable “phenomena of societal evolution,” which represent “forms of adaptation” not necessarily harmful to society. The “sickly mature,” for instance, have often contributed to the strengthening and adjustment of the institutions of society, although by procreation they may have diminished its “biological soundness” (p. 190). Then again, he added a further (and equivocating) argument, in which he emphasized the efficiency of “automatic” selection based on the “self-interest of individuals and groups” as a check to the waste of superior heredity brought about by counterselection. In support of his position, Keller did not hesitate to cite with approval a report of an address given by William T. Sedgwick, a renowned MIT public health specialist, on December 21, 1923, at the annual meeting of the Association of Life Insurance Presidents.Footnote ¹⁷ The report, which emblematically reveals the aberrations of eugenic thinking at the time, should be reproduced in its entirety:

The pendulum finally stopped swinging and Keller found a compromise in the contention that all the counterselective factors he had considered are, “in their extreme variations” (1915, p. 192; emphasis added), a threat to individual and social well-being. The persistent growth of these agencies of adverse selection, he exhorted his readers, calls for “tirelessness in the acquisition of knowledge” and “unabated vigilance in the exercise of rational selection based upon it.” The dissemination of eugenics principles among society was part of this call for action.

In Societal Evolution Keller made plain that he did not intend to discuss in detail the merits of eugenics—as he had done in his earlier essays—but to deal with eugenics in the light of the limits of rational selection. As we have seen, Keller was skeptical concerning the possibility of implementing any consciously deliberate plan of social reform, and this was mainly because he considered the masses to be the most conservative segment of society—the one on which the inertia of existing customs and mores acts more overwhelmingly. Selection is thus made predominantly on an emotional, rather than cognitive, ground and this explains why history records only very few cases of preplanned mores and institutions. A positive program of popular eugenics faces the same kind of difficulties, Keller wrote, although he did not exclude the possibility of its partial realization. He was confident that eugenic legislation would be effective against the more “undeniable” phenomena of counterselection. For instance, specific measures prohibiting marriage licences for imbeciles, epileptics, and those of unsound minds could easily obtain general consent since “they are not so foreign to the feelings and prejudices of the masses as to be dead letter” (Reference Keller1915, p. 204). But when the legislator tries to go beyond these obvious cases, Keller warned, he encounters popular opposition. Recent laws about sterilization “horrify many sensible people,” and so do marriage hygiene prescriptions based on prenuptial medical examinations. These measures have an undisputable rational foundation, but they are disapproved because they are not consistent with the core of folkways and mores governing society. There is, however, a way to overcome this resistance:

A rational plan of “eugenic regulation” can achieve widespread support only if it comes to be perceived to be related to the “concrete interests of individuals and groups”—i.e., those interests that “touch most closely upon local spheres of self-maintenance and self-realization” (Reference Keller1915, p. 206).Footnote ¹⁸

In his support of eugenics Keller was certainly a “man of his times,” but his distinct stance sets him apart from the bulk of his contemporaries in at least two crucial respects. First, nowhere in his writings did Keller establish a connection between notions of biological fitness that were common at the time and the belief that the state should intervene to improve working and social conditions. This is a fundamental difference with respect to the majority of the progressives who saw eugenics as an extension of government’s interference in social life. According to Keller any social innovation, including eugenics, must proceed automatically and with little possibility of human control, except for those cases in which “rational” selection happens to coincide with the favorable adaptation that would in any event be automatically selected by the spontaneous process of societal evolution.Footnote ¹⁹ This may explain why Keller appears to be more interested in the inculcation of eugenics principles than in delineating an effective eugenics program. He did endorse prohibiting marriage of “imbeciles,” but he otherwise demurred. In one of his early papers (Reference Keller1907, p. 197), he referred to the “nearly chimerical scheme of controlling human mating,” and in Societal Evolution (Reference Keller1915, p. 168) used the term “world-beatifiers” to describe those eugenicists heedless of the impediments to improving the race.Footnote ²⁰ Keller also appears to be immune from the overt scientism that informed much of the reform impetus of those years. Like Galton, Keller (Reference Keller1915, pp. 299–210) imagined eugenics becoming some sort of “religious dogma,” but, he immediately specified, “by religion I mean … an unreasoning fear of the unknown and supernatural, not a respect for the known and demonstrated.” A widespread acceptance of eugenics and its principles, he insisted in another place (Reference Keller1914, pp. 256–257), could not be gained through the authority of scientific evidence.Footnote ²¹ In their enthusiasm to apply the scientific method, the eugenists have failed to recognize that that “feeling—sentiment—apart from intellect shall be enlisted in the establishment of eugenics,” and that some motive “beyond and above reason” must sanction what “has been reasoned out in the threshing-over of the new idea,” before the latter can be crystallized into the mores of society.Footnote ²² This, in turn, was reflected in Keller’s opposition to the technocratic rhetoric that had accompanied the professionalization of social science in America. When Keller lamented the “expert’s contempt for the intelligence of the average man” (Reference Keller1914, p. 124), and warned that reformers always “represent the interests of different sections of the society” (p. 125), he was attacking both the authority and the impartiality of those, among his colleagues, who had been proclaimed as judges of what is good for society.

V. LATER DEVELOPMENTS

In terms of intellectual work, Keller produced much less after 1915, and Societal Evolution remained his most influential work as a sociologist. Likewise, his interest in eugenics declined over the years. Keller published no further paper on the subject and, contrary to his Yale colleagues Fisher and Fairchild, he took no part in the movement that led to the founding of the American Eugenics Society in 1926. He did continue to drop passing comments on eugenics, but these reveal a growing skepticism toward its concrete application as a plan for reform. “The eugenists seem to hope that people will come to mate or refrain from mating with the interests of future generations in mind,” wrote Keller (Reference Keller and Baitsell1922, pp. 148–149) in a later contribution, but “only the very enlightened few can be imagined as so doing.” Not just the masses but also the educated reformers act on their immediate interests, Keller continued, and by their own nature “interests are bound … to be narrowly circumscribed.” The same skepticism surfaces in the pages of The Science of Society, his ponderous four-volume revision of Sumner’s unpublished manuscripts. As pointed out by some interpreters (e.g., Smith Reference Smith1979a, Reference Smith1979b), Keller’s renditions of his mentor’s work often “distorted” the original, notably adding a biological dimension that is only latent in Sumner’s sociology, so that each of the brief comments on eugenics can be safely attributed to Keller.Footnote ²³ In the first volume, in a section devoted to the limits of rational social planning, we read:

The adjustment of a group’s mores to life-conditions, as the one required by a plan of eugenic reform, Keller concluded in the same passage, “is one of those matters that transcend the mental outfit and powers of most, if not of all men.” One point, however, should be emphasized. If Keller had lost much of his faith in the feasibility of eugenic planning, even one guided by an enlightened elite, he never repudiated the principles on which eugenics was grounded. In the Science of Society, after praising the socially useful individuals—“those demonstrated to be so by test”—he dismissed much of the talk about the natural right to life as largely “theoretical and occasional” (Sumner and Keller Reference Sumner and Keller1927, p. 613). He then asked rhetorically: “[e]ven if you can make the offspring of a low-class moron contribute some negligible service to society, is that better than to have denied procreation to his parents and thus to have spared the cost to the normal and fit?” (p. 615). Like Sumner, Keller saw inequality as essential to a working society, but, with respect to his mentor, he added a far more explicit biological twist to this contention. “Any general assumption of likeness,” he made clear (p. 616), “is a very perilous one to go on, as many failures in dealing with the ‘lower races’ have demonstrated.” Even within a single racial group or nationality, he insisted, “hereto unknown inequalities are being discovered all the time.” To sustain his claim, Keller invoked the authority of Galton, who, in Hereditary Genius (Reference Galton1869, pp. 14–15, quoted in Sumner and Keller Reference Sumner and Keller1927, p. 616), had written: [i]t is in the most unqualified manner that I object to pretensions of natural equality. The experiences of the nursery, the school, the University, and of professional careers, are a chain of proofs to the contrary.” More than twenty years after his early attack on Ward, we find again Keller rejecting the idea that the mind at birth is a tabula rasa whose development is determined by environmental influence.