In the late 1940s, Nahuel Moreno expressed into two papers (“The agrarian thesis” and “The industrial thesis”) the studies he had been carrying out and discussing within the GOM —to become POR — on the structural characteristics of the country. Later on, in 1950, this elaboration continued in a polemic with other groups and leaders of Trotskyism, in the article “Centrism in Figures” printed in Revolución Permanente magazine. The three works are still very useful and valid, as for example on the issue the Peron government was not “industrialist”, the weight of family production in the countryside, the important imperialist economic penetration, among others. They are archival materials which were not republished until now.