What historical document is pivotal in chiropractic philosophy?

The pivotal historical document in chiropractic philosophy is "The Chiropractor's Practice" by D.D. Palmer. This work is significant because D.D. Palmer is widely recognized as the founder of chiropractic. He established the fundamental principles of the practice and articulated the philosophy that underpins the chiropractic approach to health. Palmer's writing introduces key concepts such as the relationship between the spine and nervous system, the idea of subluxation, and the role of chiropractors in promoting health through spinal adjustments. This foundational document laid the groundwork for chiropractic philosophy and practice, making it a cornerstone reference for students and practitioners in the field. The other titles do not carry the same historical significance within the context of chiropractic philosophy.