Telos

Sociologically, psychologically, evolutionarily, what if a belief in god (whether he/she is fiction or not) serves a purpose? And what if this purpose is not unlike human's innate want for sex? Our far too over zealous want for sex is what propagates the species, yes? So what if a belief in a higher power helps keep the species alive as well? What if its goal is to give us hope? What if this 'hope' is an evolutionary trait?