“In the early 1900’s there were a variety of doctors and healing modalities in America. Some of the medical specialties included chiropractic, naturopathy, homeopathy, holistic medicine and herbal medicine.
To eliminate the competition Rockefeller hired a contractor named Abraham Flexner to submit a report to Congress in 1910.
This report “concluded” that there were too many doctors and medical schools in America, and that all the natural healing modalities which had existed for hundreds of years were unscientific quackery. The report called for the standardization of medical education, whereby only the AMA (another monopoly) would be allowed to grant medical school licensure in the U.S.”
https://meridianhealthclinic.com/how-rockefeller-created-the-business-of-western-medicine/
“The Report (also called Carnegie Foundation Bulletin Number Four) called on American medical schools to enact higher admission and graduation standards, and to adhere strictly to the protocols of mainstream science in their teaching and research. “
“Colleges in electrotherapy were closed.”
“Homeopathy, traditional osteopathy, eclectic medicine, and physiomedicalism (botanical therapies that had not been tested scientifically) were derided;[2] some doctors were jailed.”
“...reversion of American universities to male-only admittance programs to accommodate a smaller admission pool. Universities had begun opening and expanding female admissions as part of women's and co-educational facilities only in the mid-to-latter part of the 19th century”
https://en.wikipedia.org/wiki/Flexner_Report