Dependency theory
In "Imperialism, the Highest Stage of Capitalism" (1916), Lenin proposed that wealth would extend to the advanced (industrial) capitalist countries from the underdeveloped countries. Later, dependency theory originates with two papers published in 1949 – one by Hans Singer, one by Raúl Prebisch – in which the authors observe that the terms of trade for underdeveloped countries relative to the developed countries had deteriorated over time: the underdeveloped countries were able to purchase fewer and fewer manufactured goods from the developed countries in exchange for a given quantity of their raw materials exports. This idea is known as the Prebisch–Singer thesis. Prebisch, an Argentine economist at the United Nations Commission for Latin America (UNCLA), went on to conclude that the underdeveloped nations must employ some degree of protectionism in trade if they were to enter a self-sustaining development path. He argued that import-substitution industrialisation (ISI), not a trade-and-export orientation, was the best strategy for underdeveloped countries. The theory was developed from a Marxian perspective by Paul A. Baran in 1957 with the publication of his "The Political Economy of Growth". Dependency theory shares many points with earlier, Marxist, theories of imperialism by Rosa Luxemburg and Vladimir Lenin, and has attracted continued interest from Marxists. Some authors identify two main streams in dependency theory: the Latin American Structuralist, typified by the work of Prebisch, Celso Furtado, and Aníbal Pinto at the United Nations Economic Commission for Latin America (ECLAC, or, in Spanish, CEPAL); and the American Marxist, developed by Paul A. Baran, Paul Sweezy, and Andre Gunder Frank.