A 50-year-old law of ecology that says "big, complex systems are doomed to fail" might be completely wrong.
April 16, 2026
Original Paper
Will a Large Complex System be Stable? Revisited
arXiv · 2604.11555
The Takeaway
Since the 1970s, scientists believed that the more species and connections an ecosystem has, the more likely it is to collapse. This new study uses new mathematical approaches to prove the opposite: complexity and size don't necessarily make an ecosystem unstable. This is a massive paradigm shift because it means our most diverse ecosystems, like the Amazon or coral reefs, might be much tougher and more resilient than we gave them credit for. It gives us a new way to understand why some systems survive massive shocks while others crumble. For regular people, it’s a rare piece of good news for conservation—nature’s complexity is a feature, not a bug.
From the abstract
Over fifty years ago, Robert May applied random matrix theory to show that as ecological systems grow in size, stability decreases. What emerged from this and the critique that followed was decades of what has been called the complexity-stability debate. However, decades of critique over the assumptions that Robert May applied in carrying out his analysis have not been enough to fully dispel the strength of his conclusion and close the debate. Drawing on a mathematical approach that had not yet