According to a new study, populations with no religion will shrink while the number of Muslims and Christians will grow. The Guardian has the story:
The number of babies born to Muslims is expected to overtake those born to Christians within two decades, making Islam the world’s largest religion by 2075, according to new analysis of data by the Pew Research Center.
People with no religious affiliation are set to shrink as a proportion of the world’s population as a result of their declining birthrate and growing numbers of Muslims and Christians.