A dancing demon, no wait something isn't right there.
I do however have a theory nonetheless. A theory about the world. A theory about our past. A theory about our race. A theory based on the oldest stories from the oldest people, and lots and lots of evidence.
Let's start with the Sumerians. The Sumerian civilization came from nowhere (archeologically speaking.) Having no real predecessor. Nor do they speak of civilizations before them. In fact they believed that their civilization was brought here by the gods wholly, the Annunaki. The Sumerian civilization is the creator of the oldest known form of writing. Interesting. I wonder what else they invented? Let's take a look: the wheel, the wheeled vehicle, complex mathematics including geometry and algebra, Astronomy (they're constellations are still used to this day; orion, the crab, the bull...etc.), Military formations (such as infantry, cavalry, archers.), City states, Laws and court systems, A civic mail system, School systems, and agricultural feats used today (cultivating Mouflon and Aurochs in a grand mass production scale. They have since been bred into sheep and cattle.) That's a lot of stuff for a civilization to create from nowhere... did i mention they rose to power in 5300bc? They also used things like fireplaces, and chimney's and wooden tables with legs. They mass produced generic pottery. Even pottery with spouts at the bottom you could pull a cork out of to pour a cup. They had copper plates.
So apparently humans (archeologically speaking) walked out of the forest's and desserts and made Sumeria, a civilization that is responsible for things we even use to this day. Oh and they also wrote the first creation story and spiritual beliefs. In a nut shell? They believed they were created to work for the gods. Specifically mining gold and other raw ores and materials. Their gods? All have connection to or are depicted as reptiles or dragons. Odd. Later they gods realized that their creation (humans) were too much to handle and, having gotten what they wanted, left us to our accord.
Another quick fact. Their creation story involves a demi-god battling a god who gives birth to dragons and fish-people and serpents, and who is described as a serpent like. This aspect of the story is called a "Chaoskampf." A Chaoskampf is an element, usually in epic stories, or creation myths where a person, usually a demi-god or god, has to fight a form of chaos. This is almost always depicted as a serpent or dragon. Almost always. And this element is present in almost every single epic, creation myth, and several legends. It is so prevalent that this one aspect of a story has it's own word to describe it. Zuess did it, Hercules did it, it was apparently all the rave to champion a dragon or serpent back then.
Two more quick fact about Sumeria. They have pictures of Dinosaurs on their walls. And they talked about the flood event before Noah ever lived.
Enter Genetics. The human race has reptilian DNA in it. Not a lot, but a few genetic markers that are only found in reptiles. Odd. For being a "Mammal" we are fairly hairless, compared to the rest of our family. The Sumerians believe we were created out of red clay. The clay was made red from the blood of a dead god. We were made from a gods blood? Interesting.
My first theory. The human being was genetically altered to be physically weaker than we would have been, though far more intelligent. This genetic alteration was done in several phases and trials until they got it right. I believe this is why there are several "versions" of human before us i.e. Neanderthals and Homo-Erectus. With each incarnate of man we became less physical and more intelligent. Relying less on physical prowess and more on learning how to survive and hunt with tools. This also explains why we havn't found the missing link between us and apes yet. Because there is no missing link. We were created from genetic material. We didn't evolve from apes, we were made from their parts. Adam and Eve didn't have self awareness until they ate from the fruit that the serpent helped them get? Creation stories like this are not passed down for solely religious doctrine. The Ute's believe that at one time they lived under the world, with a race of reptile men. They warred with these reptile men until they were driven out of their underworld into the ground above. They exited the underworld at Zions. Lest us not forget also of the chimera's. Through all the old world are tales of deformed creatures that are mixed between a man and an animal. Fantasy? Maybe. Genetic manipulation? Possible. An interesting note: Species cannot mate outside their own species. This is due to chromosome pairs, and the amount of chromosomes. Though they have recently discovered that Homo-sapiens (us) interbred with Neanderthals. That means they were genetically matched to us. There is also an old account in russia, of some hunters coming upon a female bigfoot. They captured her and held her as a pet of sorts until her death. They also had sex with her, and she gave birth to several children. Who's line was always known for having incredible strength and resilience to the cold, until their line died out earlier this century. This could be easily studied by geneticists if they only cared enough to go dig the bodies up.
So what happened to non-engineered humans? Google search Sasquatch, Bigfoot, Yeti, Skunk Ape, Yahwe. A bipedel creature that is in-tuned with nature, fairly intelligent, huge, covered in hair, incredibly strong, and can talk in conversation with it's own. Eight to ten feet tall, and taller? Humans can grow that big, with a certain genetic disorder. Covered in hair? Humans can have that, with a certain genetic disorder.
That is my theory on the Human species as a race. Coming soon. The human experience of the soul.