The document challenges the traditional understanding of causality, where the cause is viewed as primary and antecedent to the effect. The author argues that this conventional theory is unsustainable due to inherent contradictions. Instead, a reversal is proposed: the effect is what defines and decides the cause. Without an active reaction or following by the effect, an antecedent remains merely a circumstance, not a true cause. This perspective emphasizes that the effect, often driven by an active subject, selectively transforms its surroundings into causal conditions. Consequently, activity has the power to redefine the status of past events by assigning them causal significance. This shifts the focus from passive determinism to the active role of the subject in constructing causal relationships, where the consequence effectively creates its own cause from the preceding reality.