Abstract
After decades of postcolonial development planning in the former colonies of Africa, one question that has been asked over and over again concerns how much has changed in Africa since the launch of what used to be called the first, second, third and other development decades. There is no doubt that national development policies and plans have played significant roles in influencing the direction of the post-political-independence development processes in Africa. This paper argues, however, that far more serious attention needs to be paid by the African public to the important contributions that the nature of their development plans can make in the transformations of their lives. This paper uses development plans as an exemplar of social mechanisms in critical realist philosophy and argues that the development planning authorities in Africa need to take seriously the nature of the relations between their ‘informal’ and ‘formal’ sectors in the formulation and implementation of their development plans