Rockefeller and Carnegie eliminated competitors through universities In the late 19th and early 20th centuries, many professions were taught in medical schools. There were homeopathic schools, naturopathic schools, herbalist schools. There were many different approaches to treating diseases. But the Rockefeller and Carnegie foundations wanted to establish a single and familiar approach. And they achieved it. They took over the entire education system and created a medical monopoly, eliminating all competition. guardians and executors.