I think it curious that mankind everywhere has left evidence of worship wherever he has been and however isolated. Could it be coincidence that all mankind for all time is independently wrong?
You need to go back and re-read your Jung, if he was covered in any of your university classes. Review his concept of
archetypes--motifs that occur in nearly all cultures in nearly all eras, including legends, visual images, rituals, etc. (Or for a more accessible version, see Joseph Campbell's popular series 20 years ago on PBS, or his many books.)
An archetype is an instinct--a belief, behavior, compulsion, visual image, legend, ritual, etc.--that is pre-programmed into our synapses by the evolution of our DNA. (Jung died before genetics became a mature, computerized, science. These are his words translated into contemporary language.)
Many archetypal behaviors can be clearly identified as survival traits in the Paleolithic Era, or even passed down from ancestral species. The instinct to run away from a large animal with both eyes in front of its face, for example, occurs in virtually all animals because one that did not have it would not have survived to reproduce and pass on his genes. A newborn giraffe will scamper clumsily away from a hyena but graze peacefully in the much larger shadow of a wildebeest.
But other behaviors are not so easy to figure out. Surely some of them are tactics for escaping the dangers of a bygone world, which we can no longer imagine. But just as surely, some are accidental relics passed down through genetic bottlenecks or genetic drift. Our species went through two of them: We're all descended from "Mitochondrial Eve," a single woman who lived around 120KYA, and from "Y-Chromosome Adam," a single man who lived around 60KYA, just before our first successful migration out of Africa, after which we became too spread out for genetic drift and bottlenecks to be possible.
As I have noted in several other threads over the years, it's not hard to hypothesize that an irrational belief in the supernatural might have been a survival trait for the species prior to 12KYA, when we lived in small bands of hunter-gatherers, regarding other bands with suspicion as competitors for scarce resources. Imagine two clan leaders meeting to discuss their mutual suspicion, and discovering to their amazement that they both believed in the same gods!
According to Jung, all of the traditional polytheistic religions have the same pantheon, only the names are changed. Each god seems to be a materialization of a distinct portion of our "spirit" (a word he freely borrows from supernaturalism)--the Hunter, the Parent, the King, the Reveler, the Healer, etc., so these archetypes go deep into our psychological composition.
When the twin technologies of agriculture (farming and animal husbandry) were first discovered (independently in many different times and places, but first in Mesopotamia around 9500BCE), the first food surplus this planet had ever seen came into existence, and it was no longer necessary for clans to compete for food. Furthermore, economies of scale and division of labor made larger farming and herding villages much more productive and prosperous--but they are hard to achieve in a population of a couple of dozen. It suddenly became an advantage for clans to merge and live together in peace.
Yet
Homo sapiens is a pack-social species, and like wolves and gorillas we instinctively regard outsiders with suspicion and enmity. It would have been very difficult for us to overcome that, to experiment with an idea that was brand-new and untested.
This is where the shared belief in deities may have broken the ice. If those guys believe in the same gods we do, they can't be all bad, right? Let's try inviting them in so we can have larger herds and crops, and a few of us can be excused from food-production duty and specialize in brewing beer, creating pottery and furniture, making pretty clothes, and composing music.
With our species's uniquely massive forebrain, we were able to override our pack-social instinct and begin living like a herd-social species, in harmony and cooperation with anonymous strangers like bison. However, 12,000 years is not a very long time for a species with a 15-25 year breeding cycle, only around 600 generations. That's not long enough for evolution to replace the genes that control our behavior with a whole new set. Deep down inside each of us there is still a caveman who regards strangers with suspicion, and every day is a struggle to remind him that the benefits of ignoring that suspicion are worth the risk (small but nonetheless real!) that occasionally a stranger may give in to his own inner caveman and go on a spree of robbery or homicide.
Unfortunately that rich pantheon of the traditional religions was replaced by the Children of Abraham with a pathetic one-dimensional model of the human spirit: one God as a role model, cramming all of our hopes, dreams, strengths, weaknesses, desires and obligations into a linear scale between "Good" and "Evil." At some point, this ridiculous perversion of our supernatural instincts, having lost some of its archetypal mooring, began to break apart into rival communities, each with its own slightly different version of the monotheistic mythology.
It's ironic that, originally, religion was probably a force for peace, harmony and cooperation, and helped our species survive and prosper; whereas today it is just the opposite: a force for hatred, discrimination and war, which threatens to destroy civilization and take us full circle back into the Stone Age, where our inner caveman can be let loose again.