Man evolved all over this planet. Associated genesis tales were spread through their communities either in written form or verbal tales. Death has always been a concern since we evolved to have large enough brains to understand cessation of life. Afterlife tales and rituals were propagated to explain the unexplainable. Once we evolved to become smart enough to question our existence and our surroundings we needed to create explanations. Why do many subscribe to the religions of the Middle Eastern and Northern Hemisphere genesis tales, Judaism and Christianity being two that are very popular. The Aborigines in Australia were a society as many as 40,000 years before the first organized societies came into place in the fertile crescent of Mesopotamia. Why do we now not subscribe to the genesis tales of those that have been organized humans for much longer than the Middle East and subsequent European societies? Why does no one take into account the Asians that most likely came across the land bridge into Alaska? They must have had some tales worth sharing and some God worth worshipping.
People will often ask if science is "my God" but no. Our modern science has but scratched the surface of what it means to be human, on a planet a favorable distance from an average sun, in a small system of planets in a medium sized galaxy of billions of stars, with planetary systems of their own that we do not have the technology to visit.
There are so many mysteries but I'm never willing to just write them off to "God" regardless of which one is referred to. Life is too fascinating to just leave it at that. There must be exploration and introspection. "God" is just too easy, and lazy.