A major problem of the defunct Organization of African Unity was

A major problem of the defunct Organization of African Unity (OAU) was ideological differences among member states. The OAU was established in 1963 as a pan-African organization with the primary objective of promoting unity and solidarity among African countries and achieving greater political and economic integration on the continent. However, there were significant ideological differences among member states, particularly with regards to the role of socialism and capitalism in development. Some member states favored socialist policies and were critical of the capitalist economies of other member states. These ideological differences made it difficult for the OAU to develop a coherent policy agenda and effectively address pressing issues facing the continent, such as poverty, conflict, and underdevelopment. Therefore, the correct answer is ideological differences.