How does one think about the form of the State in its management of conflicting ethnic groups in positive light in Africa in the present and in the future? Ethnic reality in Africa continues to be the principal determining factor of individual and collective existence, constituting an obstacle to the normal operation of its States, which often fail or collapse. In the global era, the re-organisation of power and of thought in plural societies leads to socio-political and geopolitical stabilisation. The author here argues for the implementation of 'deliberative democracy' or 'governance under the tree' as a synthesis of liberal and republican democracy based on the 'win-win' principle, different from majoritarian democracy where the 'winner takes all'. The theory of the multinational state thus proposes a constitutional, political and conceptual innovation in the plural societies of the 21st century: it entails restructuring the imagination to allow a global shift in African political thought, its needs, desires, quests, expectations and hopes.