根據 wiki:
https://en.wikipedia.org/wiki/Muslim_population_growth
Globally,
Muslims have the highest fertility rate, an average of
3.1 children per woman – well above replacement level (2.1), the minimum typically needed to maintain a stable population.
Christians are second, at
2.7 children per woman.
Hindu fertility (2.4) is similar to the global average (2.5).
Worldwide, Jewish fertility (2.3 children per woman) also is above replacement level.
All the other groups have fertility levels too low to sustain their populations and would require converts to grow or maintain their size: folk religions (1.8 children per woman), other religions (1.7), the
unaffiliated (
1.7) and Buddhists (1.6).
單就出生率看,無神論者早就該滅種了,但很多信教的孩子長大就跌倒 / 棄暗投明了,偷摘宗教聖戰的勝利果實