If God does not exist answer me this

if there is a god why did he wait until 2008 years ago or how ever long ago it was to show himself after all man has been here how many years now i think god is just mans way of exsplaining stuff they cant comprehend yet. it use to be beleaved that god was up in heaven ie up with the moon and stars yet we've been to the moon not passing heaven on the way just as hell is sapose to be below us but who here beleaves in the center of earth is where every bad soul is stored in my opion god is just a person someone came up with in the darkages cuase they didn't like being told what to do or how to live