Muhammad Ali, former attorney general Eric Holder, Children’s Defense Fund founder Marian Wright Edelman, Ariel Investments president and DreamWorks Animation SKG board chairman Mellody Hobson, journalist Charlayne Hunter-Gault, rapper Nasir “Nas” Jones, and artist Carrie Mae Weems were honored with the 2015 W.E.B. Du Bois Medals at Harvard on Wednesday. The Hutchins Center for African & African American Research hosted the celebration at Sanders Theatre. Ali picked up the honor earlier this month, but a video of his presentation played during the ceremony. Last year’s honorees included Shonda Rhimes, Maya Angelou, and Harvey Weinstein.