Since independence in 1960, Nigerias successor leaderships and the private sector manifestly failed to dispense good governance and corporate social responsibility. Both sectors, tacitly aided by foreign institutions and corporations have perverted the ends of government and justice. Ergo, in Barbarism to Decadence, Abudu Rasheed Richard Oki offers an encompassing but cursory evaluation of each successor corrupting maladministration, participatory industry roles, and systemic debaucheries, along with the vast derivative adverse impacts on the citizenry. Through research, eyewitness accounts, personal experience, etc., the book presents an assessment of the devastating decades of adventitious effects of otherworldly corruption on the nation, and a look at the overall septic effects of the vice on the rest of other black African nations. Ab initio, it delves in on characteristic fractious leaderships; past immiserating military decades; compromised judiciary/law enforcement; fraudulent elections; decrepit power supply and infrastructure; human health and educational fetidness, duplicitous and complicit local and international media; natural resource curse and colossal environmental pollution; modern-day religious chicanery and radicalized Islamic terrorism; elites otherworldly and authoritative brigandage; and ever-present suffocating misfeasance and malfeasance in the private sector. There are also the overall, undermining roles from overseas nations, institutions, and corporations; and, sui generis, Chinas hegemonic role. These are part of vast interrelated factors that hermetically immures and immolates her lumpen masses in the bonds of anomie. That correlative societal demise is portrayed in marasmus and spectral looks, along with mass spiritual and mental atrophies. Yet her affluent minority and foreign expropriation of its raw wealth and assets remain at exhilarating boil. The grim hard facts and figures indicate that Nigeria absolutely needs to be set on the right path for the long-term needs of her marred population. Meanwhile, the masses intrinsically remain restive with brutish thoughts, here and there. To wit, the crystallization of that armed mass revolutionary mettle should never be discounted in her future. So, the book provides crosscurrents, and propounds on ways to sustainably adjust her venal course mainstream. Pithily, it seeks to provide a clarion call to jettison present, and block future, serially rogue leaderships for the summum bonum.