The audience will gain a working knowledge of the biological evolutionary reason for the existence of the subluxation and the use of chiropractic adjustment. An understanding of human evolution explains the biological basis of the chiropractic subluxation A hypothesis is presented that logically argues as to why all humans should be checked for subluxations and adjusted as needed A hypothesis is presented and supported in the scientific literature as to why subluxation correction through chiropractic adjustment and other means should be maintained throughout life