Final answer:
Bartlett Joshua Palmer created the Universal Chiropractors' Association (UCA) in 1906 to provide legal support to chiropractors and defend their right to practice.
Step-by-step explanation:
The question refers to an organization formed by BJ after he declined to defend chiros in court. BJ stands for Bartlett Joshua Palmer, one of the developers of chiropractic and son of its founder, D.D. Palmer. In response to the legal challenges faced by chiropractors, which generally included accusations of practicing medicine without a license, BJ Palmer established the Universal Chiropractors' Association (UCA) in 1906. The UCA's primary purpose was to provide legal support to chiropractors, assisting them in their legal struggles and helping to ensure that chiropractors could practice their profession.