In England, institutionalized locations for science in academe and industry sprang up at approximately the same time, that is to say, during the period from the mid-nineteenth century to the First World War. By the latter date science was well established within most academic institutions and, more rudimentarily, in many industrial firms. Standardized forms of practice were to be found in both sectors, and there existed mechanisms for the transfer of personnel, knowledge and finance between the two. Both sites were of course surrounded and sustained by a network of other institutions and practices: scientific and technical societies and journals, patent and company law, government agencies and so on. Nevertheless, during the period just identified these two developed as the key occupational sites (outside schoolteaching) for men trained in science.

Recent explorations into Sigmund Freud's intellectual development by Frank Sulloway and Lucille Ritvo have directed attention to the significance of evolutionary theory for psychoanalysis. In this paper I shall pursue the exploration by showing how Darwin was received by members of the so-called Helmholtz circle (Hermann von Helmholtz, Emil du Bois-Reymond, Ernst Brücke) and certain of Freud's teachers in the University of Vienna medical school. I will make the point that the Leibniz–Kant background of these several scientists was important for this reception. I will argue that the Leibniz–Kant tradition came forward to Freud by two roads, Helmholtz's unconscious inference as foundation for a physiology of the senses, and Arthur Schopenhauer's not unrelated uses of the principle of sufficient reason to explain the possibility of lawlikeness in a universe of lawless energies. Finally, I will suggest ways in which Freud received and used the tradition.

‘We greatly want a brief word to express the science of improving stock … especially in the case of man’, the influential English scientist Francis Galton wrote in 1883. ‘The word eugenics sufficiently expresses the idea.’ During the ensuing half century, Gallon's new word and the underlying theories that he had already begun developing from the evolutionary concepts advanced by his cousin, Charles Darwin, spread throughout the Western world. With Galton's blessing these theories spawned a political movement advocating the enactment of statutes designed to encourage the propagation of eugenically fit human beings and discourage the propagation of eugenically unfit ones. Yet, while such laws were commonly adopted throughout North America and Northern Europe, the British homeland of Galton and Darwin proved reluctant to act by statutory fiat in the field of eugenics.