Changes
Michael Blume, a researcher at the University of Jena in Germany, wrote about the sub-replacement level of fertility among [[Atheist Population|atheistic populations]]: "Most societies or communities that have espoused atheistic beliefs have not survived more than a century."<ref>[http://www.scilogs.eu/en/blog/biology-of-religion/2011-01-06/atheists-a-dying-breed-as-nature-favours-faithful-sunday-times-jan-02-2011-jonathan-leake-full-draft-version Atheist: A dying breed as nature favours faithful]</ref> Blume also indicated concerning concerning his research on this matter: "What I found was the complete lack of a single case of a secular population, community or movement that would just manage to retain replacement level."<ref>[http://www.scilogs.eu/en/blog/biology-of-religion/2011-01-06/atheists-a-dying-breed-as-nature-favours-faithful-sunday-times-jan-02-2011-jonathan-leake-full-draft-version Atheist: A dying breed as nature favours faithful]</ref> See also: [[Atheism and sexuality]]
Professor [[Eric Kaufmann]]'s academic work and his book ''Shall the Religious Inherit the Earth?'' argue using a wealth of demographic data that due to the higher birth rates of religious conservatives (and the below replacement level of the irreligious) and religious immigration to the [[Western World]], atheism/secularism will decline in the Western World as early as 2021 or by 2050.<ref>[http://www.sneps.net/RD/uploads/1-Shall%20the%20Religious%20Inherit%20the%20Earth.pdf Shall the Religious Inherit the Earth?: Demography and Politics in the Twenty-First Century by Eric Kaufmann, Belfer Center, Harvard University/Birkbeck College, University of London]</ref><ref>[http://kitmantv.blogspot.com/2011/05/eric-kaufmann-shall-religious-inherit.html Eric Kaufmann: Shall The Religious Inherit The Earth?]</ref><ref>[http://kitmantv.blogspot.com/search/label/atheist%20demographics Eric Kaufmann's Atheist Demographic series]</ref><ref>[httphttps://forawww.tv/2010/09/05youtube.com/Eric_Kaufmann_Shall_the_Religious_Inherit_the_Earth watch?v=VwmgFZsgSo0 Eric Kaufmann: Shall the Religious Inherit the Earth?, Australian Broadcasting Corporation]</ref>
As noted above, in his paper, ''The Rise and Fall of the World's IQ'', Thomas Hally wrote:
