He was a member of the Israeli negotiating team that drafted the peace treaty with Egypt (Camp David Accords) in 1978, the Blair House negotiations in March 1979 and the Israeli legal team at the Taba arbitration talks between Israel and Egypt between 1986 and 1988.[4]
As the Ambassador to the United Nations, Blum was often critical of it, saying that the UN "fans the flames of the Middle East conflict." The New York Times quoted him as saying that "The essence of the Middle East conflict has always been and remains the persistent enmity of Arab states towards the Jewish national renaissance."[5]
As UN envoy, he made headlines for "scolding" a group of 133 American Jewish law students protesting Israel's invasion of Lebanon and protesting Jewish settlements in West Bank and Gaza. He questioned the factual, as well as the moral position, of the students' view, saying that they "have not given the slightest indication of their willingness to bear any personal consequences of their patronizing and fortuitous advice."[6]
Published works
Historic Titles in International Law (1965)
Secure Boundaries and Middle East Peace (1971) (with an introduction by Julius Stone)