Demographics

http://www.washingtonpost.com/blogs/worldviews/wp/2013/05/23/a-surprising-map-of-where-the-worlds-atheists-live/

http://www.pewforum.org/global-religious-landscape-exec.aspx

Atheism is doomed due to population growth 

"The contraceptive Pill was not so much secular Europe’s liberation as its cyanide tablet."
"More conservative religions do not have that problem. Only 5 per cent of the more traditional Amish leave the faith, and when a community’s birth rate outstrips the national average by 200 or 300 per cent they can easily afford to lose one in 20 of the flock."
"Those religions that survive will become more conservative."
" Many orthodox Catholics I know have 3 or 4 children – that’s not a recklessly high number, but in a society where the atheist fertility rate is around 1 child per woman, that advantage will show over a few decades, especially since orthodox Catholics have a far smaller drop-off rate than their liberal brethren."
"Today we view the ancient world’s attitude to infanticide as barbaric and incomprehensible, but perhaps future generations will look at our attitudes to abortion in the same way – that's not because pro-lifers would have won the argument, simply that (in addition to the effect of the Pill) abortion is killing the atheists of tomorrow."

http://blogs.telegraph.co.uk/news/edwest/100029971/atheism-is-doomed-the-contraceptive-pill-is-secularisms-cyanide-tablet/

http://www.blume-religionswissenschaft.de/pdf/BlumeHayekAmishFertility.pdf
http://www.blume-religionswissenschaft.de/english/wrrr.html
http://www.blume-religionswissenschaft.de/pdf/ReproductiveReligiosityBlume2009.pdf