There is a strong belief among chiropractors that everything is related to spinal alignment....it makes sense to a point as every message from the brain controlling all aspects of bodily function from gross motor right down to cellular processes, travels down the spinal cord and then branches out to the various areas of the body. If you have a subluxation in any area of the spine the nerve function can be impinged. I know myself I get a lot of relief from a severe, chronic stomach condition I have, which is clinically related to damage to the vagus nerve, from chiropractic adjustment. It is a huge leap to suggest that all it takes to resist ALL disease is a straight spine.....if it is I am screwed cos mine certainly isn't!