Nicholas Haysom, Apartheid Foe Who Became a U.N. Peacemaker, Dies at 73 NYT | Top Stories By: Adam Nossiter 30 March 2026 at 06:03 As an anti-apartheid lawyer, he was jailed several times. Later, he was a top adviser to Nelson Mandela and held key posts at the United Nations. © Albin Lohr-Jones/Pacific Press/LightRocket, via Getty ImagesNicholas Haysom at a U.N. Security Council meeting in 2019. The U.N. secretary general, António Guterres, said Mr. Haysom had “devoted his life to justice, dialogue and reconciliation” in “some of the world’s most complex and fragile settings.”