Disorder-promoted stability.

Disorder can enhance stability in complex systems with higher-dimensional or nonreciprocal nodal dynamics, overturning previous beliefs about heterogeneity's destabilizing effects.

• Why it matters: Understanding how natural and engineered systems maintain stability despite heterogeneity is crucial, as prior models suggested heterogeneity inhibits stability, conflicting with real-world observations.
• What they did: The authors analyzed systems with non-Hermitian Jacobians, including neural, power-grid, and ecological networks, demonstrating that nodal heterogeneity can promote stability even with random parameter disorder.
• The result: This work shows disorder as a beneficial resource for stability, highlighting the importance of non-Hermitian effects and nonreciprocal interactions in complex network dynamics.