Nicholas Haysom, the South African lawyer who fought apartheid and became a leading United Nations peace negotiator, died on March 17 in Manhattan at age 73. His daughter Simone Haysom confirmed his death, noting he had been suffering from heart and lung problems. UN Secretary General António Guterres described Haysom as having "devoted his life to justice, dialogue and reconciliation" in "some of the world's most complex and fragile settings."

Haysom's career was forged in the crucible of South Africa's apartheid struggle, where he was jailed multiple times for his activism. He helped draft South Africa's new constitution and served as chief legal adviser to Nelson Mandela from 1994 to 1999. His work establishing a legal framework for the post-apartheid nation laid the foundation for his later career as a high-level negotiator in conflicts across Africa and the Middle East. Colleagues remembered him as one of the last of a generation of skilled mediators, alongside figures like Sergio Vieira de Mello and Lakhdar Brahimi.

At the UN, Haysom held key positions including director for political, peacekeeping and humanitarian affairs, head of the UN Assistance Mission in Afghanistan, and special representative for South Sudan. He played crucial roles in peace processes in Burundi, Sudan, and Iraq, helping negotiate the 2000 Arusha agreement and contributing to South Sudan's independence. His approach emphasized giving voice to minority groups and ensuring all perspectives were heard, shaped by his anti-apartheid background.

Haysom's legacy reflects a lifetime dedicated to constitutional change and conflict resolution. While he witnessed many peace agreements shattered after their optimistic beginnings, his colleagues emphasized that his "charm and affability" made him a trusted interlocutor across warring factions. He is survived by his wife Delphine Bost, four children, two sisters, and two grandchildren.