Correspondence, subject files, speeches, writings, and other papers documenting Malik's teaching career at the American University of Beirut (1937-1976) and public service as Lebanese minister to the United States (1945-1953), as Lebanese delegate to the United Nations (1945-1959) and president of its General Assembly (1958-1959, and as Lebanon's foreign minister (1956-1958) during a period of civil and political strife. United Nations files pertain to his tenure (1947-1948) on the drafting committee of the Universal Declaration of Human Rights; the workings of the Economic and Social Council, Security Council, and General Assembly; and such issues as the international partition of Jerusalem, the Palestinian question, the Soviet peace resolution of 1949, and a plan promoted by Malik to translate the world's classics into all major languages. Also documented are his studies in philosophy at Harvard University and Universität Freiburg im Breisgau, his interest in theology, and his involvement with the Oxford Group, Campus Crusade for Christ International, World Council of Christian Education and Sunday School Association, and World Council of Churches. Family papers include correspondence, diaries, notebooks, and patient records of Malik's father, Habib Malik, a physician in Lebanon and Cairo and with the Turkish ordu (army) during World War I.

Among Malik's correspondents are William J. Baroody, Antony Bashir, Emile Bustani, Camille Chamoun, George Hakim, Bīyār Jumayyil (Pierre Gemayel), Bishārah Khalīl Khūrī, Clare Boothe Luce, Henry Robinson Luce, Henri Pharon, David Rockefeller, Nelson A. Rockefeller, Eleanor Roosevelt, George Nauman Shuster, and Lowell Thomas.