Why has the idea of powersharing emerge?give answer in 4points

It is true that the idea of power sharing emerged in opposition to the notions of undivided political power.Traditionall, it was believed that power should be concentrated in one hands because if power is divided then it would be difficult to take rapid decisions and apply them.But the development of the concept of democracy has changed this notion of power concentration in one hands.This is so because democracy believes in distribution of power among people as people are the source of authority.Power can be divided among the various organs of the government, two sets of the government, hat is central and the state, community government etc.
Moreover, concentration of power in one hands leads to revolution and war in the long run and breaks the unity of the nation.