Abstract The problem of managing diversity in multi-ethnic countries has posed many challenges, particularly in the developing world, because administrative and political boundaries do not conform to the boundaries of ethnic groups. They do not build on the wishes and interests of their peoples, especially in countries characterized by ethnic, linguistic and religious diversity. The transition of Western institutional experiences to the East has not produced similar results as it has achieved in its origin. Therefore, what the developing countries require to achieve successful models in the West is to develop mechanisms and constitutional foundations that go beyond regulating the exercise of power and the means of transmission, E pluralistic institutions in order to build a national identity one. And the means to follow their success in a manner appropriate to the privacy of their communities. The way to deal with issues of ethnic diversity, negatively or positively, is determined to be the problem will be or will remain just a natural situation. The most factors that give the issue a political dimension wrestling, the existence of political differentiation and social disparities and Economic development within a single state. Since its formation in 1867, the Canadian state has adopted a federal system and the sharing of power and authority. Although there are laws in Canada (British common law, French civil law), everyone is subject to the Constitution Despite the existence of many different nationalities, linguistically and religiously in Canada, and despite the different demands, but the Canadian state and under a federal and democratic parliamentary system, was able to overcome the problems and controversial issues resulting from ethnic diversity, in relation to the administration of power and rights and freedoms and The national wealth of all Canadians, especially the Francophones living in the province of Quebec, is a clear demonstration of the current decline in public support for secession.