The mid-twentieth century saw the United Nations emerge as the central institution of postwar international order, a body still finding the boundaries of its own authority and purpose. Into that uncertain arena stepped Dag Hammarskjöld, a Swedish diplomat, economist, politician, poet, and philosopher, born on July 29, 1905, in Jönköping, Sweden, to Hjalmar Hammarskjöld.

Educated at Uppsala University and Stockholm University, Hammarskjöld brought an unusually wide formation to public life. He worked as an economist and diplomat before ascending to the role of second Secretary-General of the United Nations, a position he assumed in April 1953 and held until his death. Writing and poetry were also part of his practice, conducted in Swedish, giving him a dimension that set him apart from the purely administrative figures of his era. Over the course of his tenure, he accumulated a significant number of honors: the Grand Cross of the Order of Orange-Nassau, the Grand Cross of the Order of the Dannebrog, the Commander's Grand Cross of the Order of the Polar Star, the Grand Cross of the Order of Merit, and the Knight Grand Cross of the Order of St. Olav, among others.

Hammarskjöld died on September 18, 1961, in a plane crash near Ndola, the circumstances of which cut short his time in office. He was awarded the Nobel Peace Prize, a recognition conferred in connection with his work as Secretary-General of the United Nations.