Among the members of the Mid-Career MPA class are the Mason Fellows, who are public and private executives from developing countries. Mason Fellows typically constitute about 50% of the incoming class of Mid Career MPA candidates. The Mason cohort is the most diverse at Harvard in terms of nationalities and ethnicities represented, and it is named after late Harvard Professor and Dean of the Graduate School of Public Administration, now known as the John F. Kennedy School of Government, from 1947 to 1958 Edward Sagendorph Mason who thought of bringing the developing world leaders to Harvard to stand on the cutting edge of development knowledge ultimately aiming for a better world.