From the atheist's vantage point religion exist because of evolutionary forces. But the reality is that even that argument confirms that spirituality offers a functional advantage over materialism. According to natural selection there are two main components; functional advantage and transfer of functional advantage to the next generation. So even natural selection confirms that spirituality is a behavior which leads to success. Otherwise, according to natural selection, it would have been abandoned long ago. As mankind has gained more and more knowledge of his natural surroundings his desire for spirituality has not diminished. In fact, the more materialistic we became the less satisfied we became.