The IEUS was an output of the Vienna Circle to address the "growing concern throughout the world for the logic, the history, and the sociology of science..."[2] Only the first section Foundations of the Unity of Science (FUS) was published; it contains two volumes for a total of nineteen monographs published from 1938 to 1969.
Creation of the IEUS was facilitated by the International Congresses for the Unity of Science organized by members of the Vienna Circle.
After a preliminary conference in Prague in 1934, the First International Congress for the Unity of Science was held at the Sorbonne, Paris, 16–21 September 1935.
With the active involvement of Kazimierz Ajdukiewicz (Poland), Susan Stebbing (England), and Federigo Enriques (Italy) the scope of the project for an IEUS was considerably expanded.
[3]: 173 This committee included the following members:[3]: 173 The Third International Congress for the Unity of Science, which was devoted exclusively to the IEUS, was held in Paris, 29–31 July 1937.