IRRESISTIBLE FORC

from Bouvier's Law Dictionary, Revised 6th Ed (1856)
IRRESISTIBLE FORCE. This term is applied to such an interposition of human 
agency, as is, from its nature and power, absolutely uncontrollable; as the 
inroads of a hostile army. Story on Bailm. Sec. 25; Lois des Batim. pt. 2. 
c. 2, Sec. 1. It differs from inevitable accident; (q. v.) the latter being 
the effect of physical causes, as, lightning, storms, and the like. 
    

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