The first three of these prizes are awarded for eminence in physical science, in chemistry and in medical science or physiology; the fourth is for literary work "in an ideal direction" and the fifth prize is to be given to the person or society that renders the greatest service to the cause of international fraternity, in the suppression or reduction of standing armies, or in the establishment or furtherance of peace congresses. There is no prize awarded for mathematics, but see Abel Prize.
The Formulation about the literary prize, "in an ideal direction" (i idealisk riktning in Swedish), is cryptic and has caused much confusion. For many years, the Swedish Academy interpreted "ideal" as "idealistic" (idealistisk) and used it as a reason not to give the prize to important but less Romantic authors, such as Henrik Ibsen and Leo Tolstoy. This interpretation has since been revised, and the prize has been awarded to, for example, Dario Fo and José Saramago, who definitely do not belong to the camp of literary idealism.[original research?]
There was also quite a lot of room for interpretation by the bodies he had named for deciding on the physical sciences and chemistry prizes, given that he had not consulted them before making the will. In his one-page testament, he stipulated that the money go to discoveries or inventions in the physical sciences and to discoveries or improvements in chemistry. He had opened the door to technological awards, but had not left instructions on how to deal with the distinction between science and technology. Since the deciding bodies he had chosen were more concerned with the former, it is not surprising that the prizes went to scientists and not to engineers, technicians or other inventors.
In 2001, Alfred Nobel's great-grandnephew, Peter Nobel (b. 1931), asked the Bank of Sweden to differentiate its award to economists given "in Alfred Nobel's memory" from the five other awards. This has caused much controversy whether the Bank of Sweden Prize in Economic Sciences in Memory of Alfred Nobel is actually a "Nobel Prize" / "Peace Prize".