There seems to be little doubt that the Cult of the Elibomotua was so fervently embraced by the general population, and that the daily rituals of the rac’s care and use were so faithfully performed, that the minute quantities of reagent thus distributed may have had a decisive effect on the chemical characteristics of the air. The elibomotua, therefore, may have contributed in a major way toward the prized objective of a totally man-made environment. In summary, our evaluation of both the Nacirema’s man-made environmental alterations and the artifacts found in their territories lead us to advance the hypothesis that they may have been responsible for their own extinction. The Nacirema culture may have been so successful in achieving its objectives that the inherited physiological mechanisms of its people were unable to cope with its manufactured environment.