+**Complexity** describes systems with many interacting parts, leading to intricate behaviors that are often difficult to predict or explain. It is a fundamental concept across fields, from [Physics](/wiki/physics) to [Biology](/wiki/biology), exploring how simple rules can give rise to profound, emergent patterns.
+## See also
+- [Emergence](/wiki/emergence)
+- [Chaos Theory](/wiki/chaos_theory)
+- [System Theory](/wiki/system_theory)
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