title: Paul Ehrenfest and the dilemmas of modernity.
abstract: This essay considers the highly ambivalent attitude of the Austrian-Dutch physicist Paul Ehrenfest toward contemporary developments in both science and society. On the one hand, he was in the vanguard of the quantum and relativity revolutions, supported industrialization and economic planning based on mathematical models, and, in general, cherished technocratic ideals. The essay highlights several influences that shaped his attitude in these respects, from his ties with the Philips Physics Laboratory and his sojourns in the United States to the utopian visions of H. G. Wells. On the other hand, he was extremely worried about the harmful consequences of contemporary changes in science and society, such as specialization, the growing pace of city life, and the increasing dependence on modern technologies, be they material or mathematical. In this regard, he agreed with cultural critics such as Max Nordau, Henri Bergson, Ostwald Spengler, and Ludwig Klages. Rather than attempting to solve this paradox, the essay suggests that this kind of ambiguity characterized a great deal of innovative science in the period.
authors.affiliation: Institute for the History and Social Aspects of Science, Department of Science, VU University of Amsterdam, De Boelelaan 1081, 1081 HV Amsterdam, Netherlands.
authors.forename: Frans H
authors.initials: FH
authors.lastname: van Lunteren
authors.affiliation: Netherlands Organisation for Scientific Research (NWO), Chemical and Physical Sciences Division, P.O. Box 93460, 2509 AL The Hague, Netherlands.
authors.forename: Marijn J
authors.initials: MJ
authors.lastname: Hollestelle
mesh_terms: D015984:Causality; D007722:Health Knowledge, Attitudes, Practice; D049673:History, 20th Century; D008433:Mathematics; D009426:Netherlands; D010825:Physics / Q000266:history; D012586:Science / Q000266:history; D012922:Social Change / Q000266:history