In the Nigerian state lies the problem of unity ever since its existence. Overtime, several linguists have tried to look at the diverse ethnolinguistic groups and a way out of Nigeria‟s persistent ethnic problems. Presently, Nigeria has about three hundred and fifty (350) ethnic groups alongside five hundred and twenty two (522) languages. The main problem however is the challenge of harnessing our diversities towards a viable national development. This is obvious through the various challenging crisis enveloping the nation in recent times. This work focuses on the various effects of the interactions amongst diverse ethnolinguistic groups in Nigeria to create awareness for the need of an urgent and viable solution. The sociological theory is used because of its wide coverage on ethnic interactions and conflicts. The questionnaire method is used with the analysis of descriptive statistical method involving count and simple percentage. It also shows diverse effects of ethnolinguistic diversity emanating from diverse ethnic conflicts leading to economic, social and spiritual recession in Nigeria. The research concluded that a major solution to ethnicity, tribalism, fanatism and other vices discovered is altruism empowered by early formal education to all Nigerian children and teaching the language of tolerance at every level of the diverse sectors in Nigeria.