Humberto Maturana

Chilean biologist who co-developed autopoiesis with Varela — the defining characteristic of living systems — and developed the biology of cognition, arguing that perception is not representation but a process of structural coupling.

Autopoiesis: a living system is defined by a network of processes that produces its own components, maintaining the network of processes — life is self-production, not metabolism per se. Biology of Cognition: perception does not represent an external world; it is a process of internal organization triggered by environmental perturbations — what we perceive is always our own nervous system's perturbation patterns.