Concentrated in Europe, Orthodox Christians have declined as share of the global Christian population, from 20% in 1910 to 12% today. But the Ethiopian community is highly observant and growing.
Islam is the most common state religion, but many governments give privileges to Christianity.
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.
While many, especially in the U.S., may associate Islam with the Middle East or North Africa, nearly two-thirds of the world's 1.6 billion Muslims live in the Asia-Pacific region.
Lack of formal education is widespread in many countries in south Asia, the Middle East and Africa.
There is no clear consensus among the Israeli public over whether settlements help the country’s security.