The support for vitalism was soundly shaken in 1859 when Charles Darwin published his Origin of Species. In his treatise on evolution theory, Darwin emphasized that internalized “hereditary factors” (the existence of genes had not yet been recognized) were responsible for controlling the character of evolving species. Within a decade of its presentation, Darwinian theory was endorsed by the majority of conventional scientists. Darwin’s theory of evolution denied the role of spirit or life force in the unfoldment of life on this planet. Consequently, scientists myopically focused on the search for the internalized material elements that “controlled” biological organisms.

D. D. Palmer was very sensitive to scientists’ displeasure concerning concepts related to spirit and vital forces. In formulating the original science of Chiropractic, he coined the terms Universal Intelligence and Innate Intelligence to refer to the inherent organizing intelligence of the Universe and of life.

In the early years of Chiropractic I used the terms Innate (Spirit), Innate Intelligence (Spiritual Intellect), Universal Intelligence (God) because they were comprehensive, and the world was not prepared to receive the latter terms just mentioned in parentheses. It may be even now premature to use them. (page 542, The Science, Art and Philosophy of Chiropractic).

Since vitalism is at the heart of chiropractic philosophy, and vitalism is perceived as metaphysics, the philosophy of chiropractic is not recognized by conventional medical science. Though modern medicine consider chiropractic as “unscientific,” it has not been able to ignore the large number of their patients that have been increasingly satisfied with chiropractic care. The success of Chiropractic in recent years has fueled the antagonism between conventional medical physicians and chiropractors. Biomedical research scientists are at a loss to explain the efficacy of chiropractic adjustment for it is in direct opposition to contemporary knowledge concerning biological “control” mechanisms.

Ever since the nature of DNA had been revealed, biomedical science has been grounded in the belief that the structure, function and health of an organism is directly or indirectly regulated by its genes. This has led to the concept of the Primacy of DNA, the belief that our physical and behavioral traits are controlled by genes. Scientists took a leap to the next level and subsequently evolved the idea of genetic determinism, the notion that our health and fate are “predetermined” in our heredity. Consequently, the fact that an “externalized” chiropractic adjustment can alter the expression of the system flies in the face of conventional medicine.