Government restrictions on religion and social hostilities involving religion increased in 2015 for the first time in three years. Government harassment and use of force surged in Europe, as did social hostilities against Muslims.
More babies were born to Christian mothers than to members of any other religion in recent years. Less than 20 years from now, however, the number of babies born to Muslims is expected to modestly exceed births to Christians.
The share of U.S. adults who describe themselves as Christians has been declining for decades, but the U.S. Congress is about as Christian today as it was in the early 1960s.