If the theory of the innate nature of human religiosity is accurate then one can conclude that the environmental factors only help to shape the religious thought, and that they are not the cause of it. The fact that a Muslim from Saudi Arabia and a Catholic from Italy and an Aborigine from Australia manifest religious behaviors of different forms and shapes is quite similar to any other universal human behavior.
There is also the controversial study by Dr Dean Hamer who claimed that he was able to locate the gene for religiosity. He coined the term "god gene" and reported that the God Gene worked with serotonin.
My last point is that I have been able to significantly modify the religious behavior of a few patients who manifested hyper religiosity. This change was accomplished with the use of SSRIs. Therefore, I would like to refer to human religious behavior as "Prozac of the Neanderthal."