In the long history of Muslims, there are many names of important figures who are able to bring Islam to the progress of civilization. Islam became a wave of great civilization that at that time there has been no other power capable of stopping the spirit of syiar and expansion of territory that is being done by Muslims.
The expansion of the area has actually been done since the first caliph (Abu Bakr) took over the leadership of the ummah after the popular consultation. Expansion for expansion brings several things which on the one hand have a positive impact, such as translating Greek knowledge into Arabic, acculturating Arabs with Persians, and so on. While the negative side of the expansion, the weakening internal conditions of Muslims because some of the elite busy with its own affairs because with many colonies means a lot of taxes coming in, the army stimulated to continue to hunt booty, the emergence of small kings sometimes less coordinated with the central government, As well as social inequality in the capital region.
