While growing up in a rough neighborhood in Newark, New Jersey, three high school friends made a pact: Once they graduated from college, they would move on to medical school and become doctors.

Dr. Sampson Davis, Dr. Rameck Hunt, and Dr. George Jenkins all made good on their promise. Not only are they physicians, but they are also authors and philanthropists, writing inspirational books as The Three Doctors and launching a nonprofit called The Three Doctors Foundation. The goal of their organization is to inspire kids from similar backgrounds and guide them on the path of education rather than drugs and alcohol.