The concept clarifies how insurers determine liability when multiple events contribute to a loss. It identifies the primary, or most direct, reason for the damage, even if other factors were involved. Consider a scenario where a tree, weakened by a recent storm, falls during a subsequent light breeze and damages a property. If the storm’s impact on the tree’s stability is deemed the initiating event, then the resultant property damage could be covered, even though the breeze was the immediate trigger for the tree falling. The inquiry centers on identifying the dominant and efficient cause that set in motion the chain of events leading to the loss.
This principle is crucial in insurance claims handling as it establishes a clear framework for evaluating causality and determining coverage. It ensures that policyholders are protected against losses stemming from covered perils, even when intervening factors are present. Historically, its application has evolved through legal precedent and case law, shaping its interpretation and influencing insurance policy language. A sound understanding of this concept enables fair and accurate assessment of claims, minimizing disputes between insurers and policyholders.