The Graduate School of Arts and Sciences Centennial Medal, first awarded in 1989 on the occasion of the school’s hundredth anniversary, honors alumni who have made contributions to society that emerged from their graduate study at Harvard. It is the highest honor the Graduate School bestows, and awardees include some of Harvard’s most accomplished alumni. The 2014 recipients, announced at a ceremony on May 28, are: Bruce Alberts, Ph.D. ’66, Chancellor’s Leadership Chair in biochemistry and biophysics for science and education at the University of California, San Francisco; Keith Christiansen, Ph.D. ’77, Pope-Hennessy chairman of the department of European paintings at the Metropolitan Museum of Art; Judith Lasker, Ph.D. ’76, the N.E.H. Distinguished Professor of sociology at Lehigh University; and Leo Marx ’41, Ph.D. ’50, Kenan professor of American cultural history emeritus in MIT’s Program in Science, Technology, and Society. For more about the honorands, see http://harvardmagazine.com/2014/05/centennial-medalists.