Despite Nigeria's abundance of human and natural resources, after 57 years of independence, most Nigerians live in absolute poverty. The purpose of this quantitative study was to determine the extent to which the Nigerian leadership exercised leadership capability. The primary research question investigated leadership actions that facilitated or undermined development and good governance objectives. This study adopted critical thinking leadership framework, as developed by the author. The primary data used in this study came from Afrobarometer surveys, round 4, 5, and combined data round 6, which is an updated version of independent surveys administered between 1999 and 2016. Also, data from the Transparency International, the World Bank, and the World Economic Forum were used to complement the Afrobarometer surveys. This study used descriptive statistics, multiple regression analysis, analysis of covariance, and multivariate analysis of covariance. Study results suggest Nigerian leadership exhibits self-centered attitudes toward development and good governance. Hence, the observed outcomes include poor government performance, weak economic management and governance, a high-level of ethical and financial corruption, and eroded public trust in government. It is an indication of a weak leadership capability and an absence of critical thinking leadership. This study recommends a change in the way the Nigerian government recruits top public servants if Nigeria seeks to curtail ethical and financial corruption and achieve its development objectives. This study is expected to contribute to positive social change by offering the Nigerian policymakers recommendations that are essential to address the issues associated with weak leadership capability among the Nigerian leadership.