This article discusses the development of the statistical methods employed by psychiatrists to study heredity as a causative factor of mental diseases. It argues that psychiatric asylums and clinics were the first institutions in which human heredity became the object of systematic research. It also highlights the different concepts of heredity prevalent in the psychiatric community. The first of four parts traces how heredity became a central category of asylum statistics in the first half of the nineteenth century. The second (...) part deals with attempts to introduce new methods of surveying in order to generate more precise data about psychopathological inheritance in the 1860s and 1870s. The third part discusses how, by the end of the nineteenth century, a widespread discontent with the results of asylum statistics led to an increasing interest in the use of family studies. Finally, the fourth part examines the impact of Mendelian theory on psychiatric statistics in the early twentieth century. (shrink)

Butler’s idea of evolution was developed over the publication of four books, several articles and essays between 1863 and 1890. These publications, although never achieving the success expected by Butler, proposed a psychological elaboration of evolution, called ‘unconscious memory’. This was strongly in contrast with the materialistic approach suggested by Darwin’s natural selection. Starting with a historical introduction, this paper aspires to ascertain the logic, meaning and significance of Butler’s idea of ‘unconscious memory’ in the post-Darwinian physiological and psychological Pan-European (...) discussion. Particular attention is devoted to demonstrating that Butler was not only a populariser of science but also an active protagonist in the late Victorian psychological debate. (shrink)

Contemporary Darwinian medicine is a still-expanding new discipline whose principal aim is to arrive at an evolutionary understanding of aspects of the body that leave it vulnerable to disease. Historically, there was a precedent; between 1880 and 1940 several scientists tried to develop a general evolutionary theory of disease as arising from deleterious traits that escape elimination by natural selection. In contrast, contemporary Darwinian medicine uses evolutionary theory to consider all the possible reasons why selection has left human vulnerable to (...) a disease. (shrink)

Recently there has been considerable revaluation of the development of natural sciences in the early nineteenth century, dealing among other things with the works and ideas of Charles Lyell. The task of interpreting Lyell in balanced terms is extremely complex because his activities covered many fields of research, and because his views have been unwarrantably distorted in order to make him the precursor of various modern scientific positions. Martin Rudwick in particular has contributed several papers relating to Lyell's Principles of (...) geology, and has repeatedly stressed the need for a comprehensive evaluation of Lyell's scientific proposals, and of his position in the culture of his time. In the present paper I hope to contribute to the reassessment of Lyell's work by concentrating on his discussion of transformism, which constituted the central theme of the second volume of the Principles of geology: the very length of Lyell's detailed and critical analysis of Lamarck's theories reveals the importance he attributed to the question of transformism in the contemporary natural sciences. (shrink)

American polygenism was a provocative scientific movement whose controversial claim that humankind did not share a common ancestor caused a firestorm among naturalists and the lay public beginning in the 1830s. This article gives specific attention to the largely overlooked religious ideas marshaled by American polygenists in their effort to construct race as a unit of analysis. I focus specifically on the thought of the American polygenist and renowned surgeon Dr Josiah Clark Nott (1804–73) of Mobile, Alabama. Scholars have claimed (...) that in his effort to establish a properly modern scientific view of race Nott was one of the first American naturalists to publicly denounce the notion of common human descent (monogenesis) as proclaimed in the Bible. I argue that despite his rejection of monogenesis, Nott’s racial theory remained squarely within the tradition of Christian ideas about the natural world. American polygenism provides an example of how scientific and religious ideas worked together in the minds of American antebellum thinkers in the development of novel theories about race and human origins. (shrink)

The word ‘environment’ has a history. Before the mid-nineteenth century, the idea of a singular, abstract entity—the organism—interacting with another singular, abstract entity—the environment—was virtually unknown. In this paper I trace how the idea of a plurality of external conditions or circumstances was replaced by the idea of a singular environment. The central figure behind this shift, at least in Anglo-American intellectual life, was the philosopher Herbert Spencer. I examine Spencer’s work from 1840 to 1855, demonstrating that he was exposed (...) to a variety of discussions of the ‘force of circumstances’ in this period, and was decisively influenced by the ideas of Auguste Comte in the years preceding the publication of Principles of psychology (1855). It is this latter work that popularized the word ‘environment’ and the corresponding idea of organism–environment interaction—an idea with important metaphysical and methodological implications. Spencer introduced into the English-speaking world one of our most enduring dichotomies: organism and environment. (shrink)

TheConstitution of Manby George Combe (1828) was probably the most influential phrenological work of the nineteenth century. It not only offered an exposition of the phrenological theory of the mind, but also presented Combe's vision of universal human progress through the inheritance of acquired mental attributes. In the decades before the publication of Darwin'sOrigin of Species, theConstitutionwas probably the single most important vehicle for the dissemination of naturalistic progressivism in the English-speaking world. Although there is a significant literature on the (...) social and cultural context of phrenology, the role of heredity in Combe's thought has been less thoroughly explored, although both John van Wyhe and Victor L. Hilts have linked Combe's views on heredity with the transformist theories of Jean-Baptiste Lamarck. In this paper I examine the origin, nature and significance of his ideas and argue that Combe's hereditarianism was not directly related to Lamarckian transformism but formed part of a wider discourse on heredity in the early nineteenth century. (shrink)

This paper analyzes the impact that Lamarckian evolutionary theory had in the scientific community during the period between the advent of Zoological Philosophy and the publication Origin of Species. During these 50 years Lamarck’s model was a well known theory and it was discussed by the scientific community as a hypothesis to explain the changing nature of the fossil record throughout the history of Earth. Lamarck’s transmutation theory established the foundation of an evolutionary model introducing a new way to research (...) in nature. Darwin’s selectionist theory was proposed in 1859 to explain the origin of species within this epistemological process. In this context, Charles Lyell’s Principles of Geology and Auguste Comte’s Cours de Philosophie Positive appear as two major works for the dissemination of Lamarck’s evolutionary ideology after the death of the French naturalist in 1829. (shrink)

Examines the history and inherent flaws of the tests science has used to measure intelligence.

Phillip Sloan has thoroughly documented the importance of Darwin's general invertebrate research program in the period from 1826 to 1836 and demonstrated how it had an impact on his conversion to transformism. Although Darwin later spent eight years of his life investigating barnacles, this period has received less treatment in studies of Darwin and the development of his thought. The most prominent question for the barnacle period that has been attended to is why Darwin "delayed" in publishing his theory of (...) evolution. A related but distinct question concerns the variety of earlier events and influences that led Darwin to the study of "Cirripedia" in 1846, apart from its role in the trajectory that led to "On the Origin of Species ". In this paper I focus on four specific episodes prior to 1846 that inform a picture of why Darwin had an antecedent interest in barnacles: the orientation to collecting strange and curious invertebrate organisms, as well as the strong affinities of Darwin's invertebrate collecting on the Beagle voyage with the work of John Vaughan Thompson; the critical role of marine invertebrate fossils in Darwin's geological reasoning aboard the Beagle and exemplified in his "Geological Observations of South America;" the strange absence of a "Zoology of the Beagle" volume on invertebrates and Darwin's original intent to publish some of the descriptions himself; and the noteworthy presence of barnacles in Darwin's transformation theorizing between 1837 and 1839. There is a wealth of support for the thesis that Darwin had a strong interest in cirripedes prior to the formal barnacle research, blunting arguments that it was psychological aversion or a feeling of inferiority about his taxonomic abilities that drove Darwin to the cirripedes. (shrink)