I’m glad that evolutionary theory — so long framed almost entirely around competition — is finally being nuanced by a deeper recognition: cooperation is also fundamental to life itself. Few scientists embodied this shift more powerfully than Lynn Margulis.
She was rejected 15 times, dismissed as unruly, and largely pushed aside by the scientific establishment. Then the evidence proved she was right — and it changed biology forever.
In 1966, at just twenty-eight years old, Margulis proposed an idea that challenged one of science’s deepest assumptions. Evolution, she argued, was not driven only by struggle and competition. Some of life’s greatest breakthroughs emerged through collaboration (Margulis, 1967).
Her theory of endosymbiosis proposed that mitochondria — the energy-producing structures inside every complex cell — were once independent bacteria. Instead of destroying one another, ancient organisms formed a partnership so profound that they eventually became inseparable.
Every breath we take, every thought we think, depends on this ancient cooperation.
She called the process symbiogenesis: the creation of new life forms through living together (Margulis & Sagan, 2002).
Fifteen scientific journals rejected her paper before it was finally published in 1967.
Years later, advances in DNA sequencing confirmed what she had seen long before others could. Mitochondria contain their own DNA — and that DNA is bacterial. Her theory was no longer radical speculation. It became a cornerstone of modern evolutionary biology.
What Margulis left us is more than a biological insight. It is a different way of seeing life itself.
Every complex organism on Earth is, at its core, a collaboration.
The boundary between self and other was never as clear as we imagined. Life did not evolve only through conquest. Sometimes, the greatest leap forward came through learning to live together.
References
Margulis, L. (1967). On the origin of mitosing cells. Journal of Theoretical Biology, 14(3), 225–274. https://doi.org/10.1016/0022-5193(67)90079-3
Margulis, L., & Sagan, D. (2002). Acquiring genomes: A theory of the origins of species. Basic Books.
Source photo: AvO