Randomness is considered a fundamental principle in many sciences. This paper demonstrates that randomness is not a real cause but rather a manifestation of unknown or too complex underlying order. All seemingly random events are determined by hidden structures, even if they are unpredictable to us. This insight calls for a fundamental revision of models that assume randomness as an ontological reality. Structure is the foundation of all change and replaces randomness as an explanation. This opens new perspectives for physics, biology, and philosophy and provides a crucial basis for future scientific developments.