A DARK CENTURY FOR SUB SAHARA AFRICA Is the analysis of internal factors influencing foreign direct investment (FDI) in Nigeria, thus sub Sahara Africa in the broader context. Its purpose is to determine the internal factors: market size, political instability, corruption, natural resources and business climate influencing foreign direct investment. The direction of the case study is formulated by two research questions: What factors are likely to hinder FDI in Nigeria and what factors are likely to encourage FDI in Nigeria? The text is in six chapters. The first chapter examines the subtle truth, thus foreign direct investment flow to sub Sahara Africa. The second chapter explores some foreign direct investment foundation theories and recent scholarly studies on internal factors influencing FDI. The third chapter analyzes the internal factors influencing foreign direct investment within the context of the Nigerian economy. The fourth chapter examines the case study: Design Description, instrument construction, survey design, sample selection, steps of survey administration, data analysis and the limitations of the study.The fifth chapter reports the case study findings: demographics and case study results. The sixth chapter emphasizes on the remedies, thus presents wide-ranged reforms that include reform of the base social institutions and adoption of base economic development strategies and policies to drive in economic programs in Nigeria. Undoubtedly, the study is a valuable contribution to academic and policy research on Africa, laying out the action plan for the new future of Nigeria, thus, a plan of guide for other countries in the region, as well. It satisfies the reading and research needs of the academic and non-academic groups seeking to know part of the problem of economic development in sub Sahara Africa and the proffered remedies, thus the study and findings are persuasive and applicable.