How has philosophy’s role in cognate disciplines been changing? We could ask this question about philosophy and political theory, or cognitive science, or business ethics, or theoretical physics, and so on. In the following guest post, the focus is on philosophy and bioethics. Authors Vilius Dranseika, Piotr Bystranowski, and Tomasz Żuradzki (Interdisciplinary Centre for Ethics, Jagiellonian University) examine the claim that philosophy’s role in bioethics is diminishing. They take a data-driven approach to the problem, looking at trends in how frequently philosophical work is cited, and how often especially philosophical topics are discussed, in bioethics literature. In addition to putting forward their view of the matter, they are seeking feedback from readers about this method and their particular application of it. Are Philosophy’s Glory Days in Bioethics Over? by Vilius Dranseika, Piotr Bystranowski, and Tomasz Żuradzki There is a familiar claim that, when compared to the early days of bioethics, the role of philosophy in bioethics has diminished. Let’s call it the Disconnection Thesis. The latest discussion of this claim can be found in a recent American Journal of Bioethics (AJOB) target article, “The Place of Philosophy in Bioethics Today” (Blumenthal-Barby et al. 2022). While the authors do not openly endorse the claim, much of the paper consists of suggestions how the role of philosophy in bioethics could be made more pronounced. However, do we know whether the Disconnection Thesis is true? How could we test it? And even if we concede that philosophy plays a relatively small role in bioethics today, can we check whether that role was significantly more marked at some earlier stage of this relatively young academic field? In this blog post, based on our commentary just published in AJOB (Bystranowski, Dranseika, Żuradzki 2022b) we would like to do two things. First, we describe several attempts to test the claim that the role of philosophy in bioethics has diminished. Second, we want to encourage the readers to suggest what other observable—and testable—patterns we could expect were this claim true. First, we hypothesized that, if the Disconnection Thesis is true, older bioethics articles can be expected to relatively more frequently cite philosophy articles. To test this, we downloaded Web of Science citation data for papers published in..