Commonly cited estimates of the Muslim population in 2007 range from 1 billion to 1.8 billion. Approximately 85% are Sunni and 15% are Shi'a, with a small minority belonging to other sects.
Some 30-40 countries are Muslim-majority, and Arabs account for around 20% of all Muslims worldwide. South Asia and Southeast Asia contain the most populous Muslim countries, with Indonesia, India, Pakistan, and Bangladesh having more than 100 million adherents each.[109]
According to U.S. government figures, in 2006 there were 20 million Muslims in China.[110] In the Middle East, the non-Arab countries of Turkey and Iran are the largest Muslim-majority countries; in Africa, Egypt and Nigeria have the most populous Muslim communities.[109]
Islam is the second largest religion after Christianity in many European countries.[111]
The Quran is the holy book which Muslims recite and turn to for guidence in all aspects of their life. It is the last testament in a series of divine revelations from God. 
Every language has one or more terms that are used in reference to God and sometimes to lesser deities. This is not the case with...