The document discusses modernization theory, which was a theory of development prominent in the 1950s. It posited that traditional societies would develop as they adopted more modern practices from Western societies. This would involve changes in values, social structures, and the adoption of Western models of government, industry, and technology. However, modernization theory made assumptions that ignored the colonial histories and contexts of non-Western societies. It presented Westernization as the only path to development and did not consider the social and environmental costs of the development model it promoted.