Andre Gunder Frank is widely regarded as the father of Dependency Theory, having coined the term and developed its core concepts in his 1967 book, 'Capitalism and Underdevelopment in Latin America'.

Dependency Theory argues that the economic and political structures of the global system create a situation where developing countries are systematically exploited by developed countries, leading to their underdevelopment.

Unequal Exchange is a key concept in Dependency Theory, referring to the situation where developing countries are forced to export primary goods, such as agricultural products and raw materials, to developed countries at low prices, while importing manufactured goods from developed countries at high prices.

Dependency Theory argues that foreign investment from developed countries often leads to the exploitation of developing countries, as it can result in the repatriation of profits, the displacement of local industries, and the imposition of unfavorable terms of trade.

Dependency Theory argues that dependency and underdevelopment are mutually reinforcing processes, where dependency leads to underdevelopment and underdevelopment perpetuates dependency.

Andre Gunder Frank's study on dependency focused primarily on Brazil, where he examined the country's economic and political history to illustrate the mechanisms of dependency and underdevelopment.

The Center-Periphery Model is a core concept in Dependency Theory, which divides the global economy into two main zones: the center (developed countries) and the periphery (developing countries). The model explains how the economic and political power of the center exploits the periphery, leading to the underdevelopment of the latter.

Theotonio dos Santos argued that dependency is not simply a historical process that can be overcome through economic development, but rather a structural condition inherent in the global capitalist system.

Dependency Theory argues that the state in developing countries often serves as a tool of the ruling class to maintain their power and exploit the working class, rather than promoting the interests of the majority of the population.

Andre Gunder Frank argued that dependency can only be overcome through a socialist revolution that transforms the global capitalist system.

One of the main criticisms of Dependency Theory is that it tends to overemphasize the role of external factors in underdevelopment, while neglecting the importance of internal factors such as political instability, corruption, and lack of good governance.

Fernando Henrique Cardoso argued that dependency can be overcome through regional integration and cooperation among developing countries, allowing them to reduce their dependence on developed countries.

Dependency Theory argues that dependency leads to increased social inequality within developing countries, as the benefits of economic growth tend to be concentrated in the hands of a small elite, while the majority of the population remains impoverished.

Enzo Faletto argued that dependency can be overcome through import substitution industrialization, which involves developing domestic industries to reduce reliance on imports from developed countries.

Dependency Theory has had a significant impact on the field of sociology, contributing to our understanding of the relationship between developed and developing countries and the challenges faced by developing countries in achieving economic and social development.