Effects of unity and disunity of the Islamic nation with an emphasis on verses and narrations

Islam knows the preserving the unity of the Islamic nation as the basic issues of society, and encourages unity creators and blames those makes differentiate and divide people and nations. For this reason the issue of unity and disunity have been discussed from various aspects by scholars and elites of the Islamic world; this article evaluates the beneficial results of Islamic unity and the harmful effects of disunity with a special look at the verses and traditions and also has brief look at dispute factors.