Before analyzing the ISI (Import Substitution Industrialization) model, its advantages as well as its defects, it is necessary to provide a small introduction on how it was born and why . Product of the economic crisis of the 1930s and the wear and tear of the liberal model, the ISI appears in Latin America as another economic option, proposed by the ECLA (Economic Commission for Latin America, dependent on the UN) as a means to get Latin America out of stagnation and work towards industrialization to eliminate its dependence on agriculture considered vulnerable. There are two critical ways in which this model needs to be examined, both theoretically and its concrete results and policy implications within Latin American states. By looking at these, it is possible to better understand core-periphery international relations and Latin American approaches to economic development. In theory, ISI has been one of the main issues examined by the structuralist model, along with others such as the terms of trade. , the effect of the agrarian structure as an obstacle to economic progress and inflation. This theoretical paradigm describes social and political relations after the Second World War. Raúl Prebisch, Argentine economist and head of ECLA (which later incorporated the Caribbean), and Celso Furtado, famous Brazilian economist, are those who contributed to the structuralist interpretation and study to highlight the development of Latin America, or the its lack. This theory shows that development and underdevelopment are deeply intertwined; believes that developed countries, such as the post-World War II United States and pre-World War II England, have contributed to maintaining underdevelopment within the periphery through the IDL (international division of... center of paper.. . of the subsisting property), attempts to solve the Indian problem will remain forgotten in the denunciation process. He argues that the land was originally communal and that the "conquistador" introduced feudalism, which continues to this day, disrupting the pace of national progress in the form of. gamonalism and latifundia. Against the current selfish gamonalism, the communities constitute a clear protest and a necessary reaffirmation of the just. In conclusion, although structuralist and dependency theories are aware of the land ownership system and the repercussions it has also had on society such as centre-periphery relations..