Since the discovery and commercialization of crude oil in Nigeria during the 1970s, the country has experienced a significant shift in its economic structure. The ascendancy of the oil sector led to the gradual displacement of agriculture and the neglect of other productive sectors of the economy. This overreliance on crude oil has made Nigeria’s economy highly susceptible to external shocks, particularly fluctuations in global oil prices. Despite being Africa’s top oil-producing country and deriving over 95% of its export earnings and approximately 70% of government revenues from oil and gas, the volatility and finite nature of oil resources have raised critical concerns regarding long-term sustainability.
This review traces the historical evolution of Nigeria's dependence on oil and the associated economic vulnerabilities. It highlights the decline in the sector’s contribution to nominal and real GDP over recent years, as revealed by post-GDP rebasing data from the National Bureau of Statistics. For instance, the oil and gas sector’s contribution to nominal GDP fell from over 40% pre-rebasing to less than 15% in subsequent years, while its real GDP share declined to below 9% by the end of 2014. These figures underscore the growing challenges facing the sector, including price volatility and production constraints.
In light of these developments, the paper underscores the urgency of economic diversification as a strategic policy response. It emphasizes the untapped potential of Nigeria's non-oil sectors—particularly agriculture, manufacturing, and services—as viable pathways for sustainable economic growth, job creation, and foreign exchange generation. The review further argues that diversifying away from oil dependence is not merely an economic imperative but a policy necessity to ensure macroeconomic stability and resilience in the face of global uncertainties