Written by Marco Antonio Rodrigues Dias Member of the EAVI Advisory Committee  In June 1975 - at the time I was at the University of Brasilia (UnB) and was dean of extension - I participated, as a specialist in communication policy, in an international symposium on "Mass communication in rapidly developing societies" - in Mashad, Iran, invited by the National Iranian Radio and Television (NIRT). My name had been suggested to the organisers by Elihu Katz who passed away on 31 December 2021 at the age of 95. Katz was one of the pioneers of [...]