In addition to having a sub-replacement level birthrate (see: [[Atheism and fertility rates]]), a shrinking global market share and the immigration of religious immigrants, atheist activists are expected face stiff competition from the major religions of [[Christianity]] and [[Islam]] in the 21st century - especially the more conservative/fundamentalist strains of these religions. See also: [[Growth of evangelical Christianity]] | In addition to having a sub-replacement level birthrate (see: [[Atheism and fertility rates]]), a shrinking global market share and the immigration of religious immigrants, atheist activists are expected face stiff competition from the major religions of [[Christianity]] and [[Islam]] in the 21st century - especially the more conservative/fundamentalist strains of these religions. See also: [[Growth of evangelical Christianity]] |