Blue, your question is filled with what some may see as speculations and
unproven theories of the history of this earth. You have proposed a scenario where mankind may have actually agreed on a course of action where groups of civilizations have moved forward as a whole.
I will answer your question with another question: When has mankind
ever agreed as a whole on anything for the betterment of the human species?
There are as many theories and beliefs as there are people on this earth.
Some of us may ascribe to similar convictions, but few will stand up for
their own beliefs, much less another's beliefs.
The idea that we all could ascend as a whole sounds like a wonderful
cohesive idea. But, as long as we still have free will, we will have many different conjectures.
I really wish that my thoughts were incorrect. It would require a great deal of information coming at once to convince a world of humans to
take a giant leap of faith. And, then, can we be absolutely certain we are not being duped by some malevolent super race?
Good question, Blue.