After rejection of the EDC project the federalists became increasingly divided as to the strategy to be followed by the U.E.F. between those who, following Altiero Spinelli (1907–1986), favoured the constitutional approach, and those who preferred a step-by-step approach. The former could not be satisfied with a mere common market; the latter fully supported it. This conflict led to a split of the UEF in July 1956 and its division into two organisations: the "Mouvement Fédéraliste Européen" (M.F.E.), formed from militants of the former constitutional persuasion, and the "Action Européenne Fédéraliste" (A.E.F.) bringing together those of the latter.