William Ury is an American author, negotiation expert, and co-founder of the Harvard Negotiation Project. He is best known for his work on conflict resolution and has written several influential books, including Getting to Yes, which he co-authored with Roger Fisher. Ury's approach emphasizes the importance of understanding interests and finding mutually beneficial solutions. In addition to his writing, Ury has served as a consultant and mediator in various international conflicts. He has worked with organizations such as the United Nations and has been involved in peace negotiations in regions like the Middle East and South America. His contributions have made a significant impact on the field of negotiation and conflict resolution.