What is the importance of Abraham Flexner in the nonfiction book, Witches, Midwives, and Nurses?

Abraham Flexner was a staff member of the Carnegie Corporation who was chosen to conduct an assessment of American medical schools. More importantly, he was single-handedly given the power and responsibility of deciding which schools would receive philanthropic patronage from the Carnegies. Flexure's assessments and decisions resulted in significant funding for large schools which catered to white, male, and middle-class students. Flexure did not consider smaller sectarian schools which catered to women and people of color to be worth saving, and scores of them closed as a result of his actions. As such, Abraham Flexner is symbolic of how American business and the decision-making power of the wealthy, male, and white ruling-classes had significant impact on the evolution of the healthcare industry and the exclusion of women, people of color, and the lower-classes from professional medicine.