ESHS/HSS Annual Meeting

Making a scientific rebel: Lynn Margulis (1938-2011) and the popularization of the endosymbiotic theory

• In Event: Unorthodox Women, Unorthodox Ideas in Modern Biological Research

English Abstract

In 1996, evolutionary biologist Richard Dawkins praised Lynn Margulis for her “courage and stamina” that carried the endosymbiotic theory “from being an unorthodoxy to an orthodoxy.” Her 1967 article “On the origin of mitosing cells,” published two years after completing her PhD at Berkeley, is considered a “classic paper” today. It took until the 1980s for her theory to gain broad acceptance, marked f.i. by a 1989 Rockefeller Foundation sponsored conference, and it is now textbook knowledge.
What is the content of the endosymbiotic theory? Who was its chief proponent, Lynn Margulis? And why did advancing it require such persistence?
Margulis argued that mitochondria and chloroplasts originated as free-living bacteria that entered long-term symbioses with ancestral eukaryotic cells. While earlier researchers proposed related ideas, she integrated scattered lines of evidence into a testable framework at a time when neo-Darwinian gradualism dominated evolutionary biology and competition was the paradigm of Cold War politics.
Margulis often emphasized the resistance she faced, noting that her first endosymbiosis paper was “rejected by about fifteen scientific journals.” Her ideas were sometimes described as “radical,” and she was portrayed as a “scientific rebel.” Yet her career was also marked by institutional success: appointments to distinguished professorships at Boston University and the University of Massachusetts Amherst, and the National Medal of Science in 1999.
By examining Margulis’ own narrative of defiance alongside obituaries (2011/2012) and publications surrounding the 50th anniversary of her first major paper (2017), this contribution traces (1) the trajectory of the endosymbiotic theory from fringe to orthodoxy, (2) the evolution of Margulis’s career from precarious early appointments to scientific prominence, and (3) the rhetorical framing that cast her as a revolutionary even after she had become a central figure in modern biological historiography.

Author

• Matthis Krischel, Heinrich Heine University Duesseldorf, Germany