Secularism will decline worldwide while religion grows, according to a new study in the journal Evolutionary Psychological Science.

The findings, reported in the Times, observed more than 4,000 students in Malaysia and the United States, and found that the more religious they were, the more children they would end up having.

According to the researchers, the proportion of secularists in the world population will “slowly diminish”, while the number of religious believers will rise.

The chief reason, the study concluded, was that since the 19th century the non-religious have been much more likely to use contraception.