An average third world country strives after development. Yet, culture, being the total way of life of the people, has exerted great impact both in the development and underdevelopment of the third world countries. Culture forms the ideas, customs, and social behavior of a particular people or society. However, where the culture adopted from antiquity opposes the present changing world realities, it becomes a problem of contemporary concerns. Using a descriptive and analytical method, and cultural determinism theory, this chapter examines the role of culture in the development of underdevelopment of the third world countries (a sketch study of Africa). It argues that the cultures that lead to the development of the third world countries will gradually lead to conflict prevention and peacebuilding. Culture and development are essential notations to be reconsidered and re-enforced in the third world. Hence, to attain relevance, both must be complemented. The chapter therefore helps to harness and foster the complementation between culture and development in the third world countries.