An extensive study of the nations of the world and their individual relationships with religion has found that Islam is the world's most common state religion, and listed the 10 non-religious nations that are hostile toward Christianity and other religious institutions.
Pew Research Center released on Tuesday a study of 199 countries and self-administering territories, based on data for the year ending Dec. 31, 2015. It found that the majority of the world's countries do not have an official or a preferred religion.
Overall, 22 percent of the total, or 43 nations, had a state religion, with 27, or 63 percent of those following Islam.
Thirteen states had Christianity as their official religion, along with two for Buddhism, and one for Judaism. ...