 The four-year congress cycle continued with meetings in Vienna (1952), Philadelphia (1956), Paris (1960) and Moscow (1964).Up to this point the IUAES remained separate from the ICAES, and was presided over by different people until Henri Vallois took over both presidencies in 1956.Just four years prior to this, in 1952, the International Social Science Council (ISSC) was founded and the IUAES has been represented in it ever since.