Modernization theory is a theory used to explain the process of modernization

Modernization

In the social sciences, modernization or modernisation refers to a model of an evolutionary transition from a 'pre-modern' or 'traditional' to a 'modern' society. The teleology of modernization is described in social evolutionism theories, existing as a template that has been generally followed by...

 within societies. The theory looks at the internal factors of a country while assuming that, with assistance, "traditional" countries can be brought to development in the same manner more developed countries have. Modernization theory attempts to identify the social variables which contribute to social progress

Social progress

Social progress is the idea that societies can or do improve in terms of their social, political, and economic structures. This may happen as a result of direct human action, as in social enterprise or through social activism, or as a natural part of sociocultural evolution...

 and development of societies, and seeks to explain the process of social evolution

Social evolution

Social evolution is a subdiscipline of evolutionary biology that is concerned with social behaviors that have fitness consequences for individuals other than the actor...

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