Alexander William Lowndes "Alex" de Waal (born 22 February 1963), a British writer and researcher on African issues, is the executive director of the World Peace Foundation at the Fletcher School of Law and Diplomacy at Tufts University. Previously, he was a fellow of the Harvard Humanitarian Initiative at Harvard University, as well as program director at the Social Science Research Council on AIDS in New York City.
Considered one of the foremost experts on Sudan and the Horn of Africa, his scholarly work and practice has also probed humanitarian crisis and response, human rights, HIV/AIDS and governance in Africa, and conflict and peacebuilding.
He is the son of Esther Aline (née Lowndes-Moir), a writer on religion, and Rev. Dr Victor de Waal, Dean of Canterbury from 1976 to 1986. His siblings include barrister John de Waal, ceramic artist and writer Edmund de Waal, and Caucasus expert Thomas de Waal.
In 1988, de Waal received a D.Phil in social anthropology at Nuffield College, Oxford for his thesis on the 1984-5 Darfur famine in Sudan. This research formed the basis of his book, Famine That Kills: Darfur, Sudan (1989). The following year he joined the Africa division of Human Rights Watch, only to resign in December 1992 in protest for HRW's support for the American military involvement in Somalia. He was the first chairman of the Mines Advisory Group at the beginning of the International Campaign to Ban Landmines.