Although I agree that early humans probably didn't suffer as much from abandonment, they probably experienced some mental or emotional void or trauma at the lost of a family member. We see, for example, how elephants seem to exhibit almost human emotion and reverence when they return to caress the bone of long dead pack members. Like less sophistocated animals, what I'm suggesting is that religious ideas among early humans probably began as a desire to fill a void left vacant by the death of a valued family member. As I suggested in a previous post, rememberance of the dead likely lead to keepsakes that evolved into objects of worship then into objects of worship beyond the material. I agree, contemporary people don't just make a leap from a lost parent into a belief in some supernatural being. However, primitive people, over a period of many thousands of years, likely made a leap that allowed them to keep their departed loved ones among them in spirit. The greater dependency amony early humans, as opposed to the great apes, likely led to this type of mental and emotional compensation for their social loss.