A former professor of journalism at UNC and the co-founder of the National Association of Black Journalists, Charles Sumner “Chuck” Stone, Jr. died Sunday at the age of 89, according to multiple media outlets.

Stone was an influential writer for some of the leading African-American publications like the Washington Afro-American, the Chicago Daily Defender, and the New York Age.

At UNC, Stone taught censorship and magazine writing from 1991 until his retirement in 2004. He first began his teaching career while he was at the Daily News and taught at Bryn Mawr College’s Graduate School of Social Work and Social Research. He taught at Harvard University in the John F. Kennedy School of Government in the early 80s. He also taught journalism at the University of Delaware in the mid 80s.

Stone is survived by by his children Krishna Stone, Allegra Stone and Charles St. Stone III; grandchild Parade Stone; and sisters Madalene Seymour and Irene Gordy. In lieu of flowers, donations may be made to the Chuck Stone Citizen of the World Fund at the UNC School of Journalism and Mass Communication Foundation of North Carolina.