Alejandro Fábregas Tejeda is a PhD student at Ruhr-University Bochum under the DFG-Emmy Noether Research Group The Return of the Organism in the Biosciences: Theoretical, Historical, and Social Dimensions. He holds a B.Sc. degree in Biology and a M.A. in Philosophy of Science (with complementary specialization in History of Science) from the National Autonomous University of Mexico (UNAM). He graduated from the latter in 2019 with a dissertation entitled “The Extended Evolutionary Synthesis Debate: Historical, Philosophical and Sociological Dimensions” (M.A with honors).

His PhD project is focused on the ‘return of the organism’ to the life sciences, which has been signaled by historians and philosophers of biology with renewed emphasis in the last lustrum. In manifold fields and research areas, the ‘organism’ is being conceptualized as a causally efficacious, autonomous, and active ontogenetic unit that transcends the properties of its parts (e.g., genes), whilst standing in a deeply entangled relationship with its environment. Alejandro´s dissertation, departing from the standpoint of integrative history and philosophy of biology, delves into the epistemological, ontological and historical dimensions of this juncture. Its main focus is reassessing the ‘organism-environment pairing,’ bringing into play the historicity of long-standing theorizations regarding this ambiguous relationship, and contemporary insights from philosophy of science and philosophy of biology. How is this relationship being construed in current developments and how have scientific reflections related to this topic changed throughout the twentieth century?



  • 2020-: PhD student in Philosophy, Department of Philosophy I, Ruhr-University Bochum
  • 2019: Visiting M.A. Student, Department of Philosophy I, Ruhr-University Bochum
  • 2017-2019: M.A. in Philosophy of Science, Universidad Nacional Autónoma de México (UNAM)
  • 2017: Gabino Barreda Medal in University Merit (B.Sc. in Biology), UNAM
  • 2011-2016: B.Sc. in Biology, School of Sciences, UNAM



  Journal Articles

  • Does the Extended Evolutionary Synthesis entail extended explanatory power? In: Biology & Philosophy 35, 20 (Co-authors: Jan Baedke, Francisco Vergara-Silva; 2020) [download pdf]
  • The holobiont concept before Margulis. In: Journal of Experimental Zoology Part B: Molecular and Developmental Evolution (Co-authors: Jan Baedke, Abigail Nieves Delgado; 2020) [download pdf]
  • New Perspectives on Theory Change in Evolutionary Biology. In: Journal for General Philosophy of Science 50(4), 573-581 (2019) [download pdf]
  • The emerging structure of the Extended Evolutionary Synthesis: where does Evo-Devo fit in?. In: Theory in Biosciences 52, 169-184 (Co-author: Francisco Vergara-Silva; 2018) [download pdf]
  • Hierarchy Theory of Evolution and the Extended Evolutionary Synthesis: Some Epistemic Bridges, Some Conceptual Rifts. In: Evolutionary Biology 45, 127-139 (Co-author: Francisco Vergara-Silva; 2018) [download pdf]



    Selected talks

  • The Extended Evolutionary Synthesis debate: some ontological, epistemological and historical dimensions. July 8th 2019, Meeting of the International Society for the History, Philosophy and Social Studies of Biology (ISHPSSB), University of Oslo, Norway
  • The Extended Evolutionary Synthesis debate: some epistemological and sociological dimensions. April 2nd 2019, Evolution Evolving: Process, Mechanism and Theory, University of Cambridge, United Kingdom (Co-author: Francisco Vergara-Silva)
  • Explanation and the Extended Evolutionary Synthesis: Explanatory Integration, Epistemic Goals, and Explanatory Power. March 21st 2019, The Extended Evolutionary Synthesis: Philosophical and HIstorical Dimensions (7th Workshop on History and Philosophy of the Life Sciences), Ruhr-University Bochum, Germany

Alejandro Fábregas Tejeda, M.A.

Fakultät III, Institut für Philosophie I
GC 05/706
Ruhr-Universität Bochum
Universitätsstr. 150
44801 Bochum
Tel. +49(0)234/32-24816