While I agree with a lot of the points that you make in general, I think that your time line is waaaaay off!
The Pyramids are more than a 100 years old.
The precise age of the pyramids of Giza has long been debated because, until now, there has been little evidence to prove when the pyramids were built. The history books generally point to 3200 B.C. as the approximate date when the pyramid of Khufu was under construction.
Some people believe that they are much older than that even, but either way, you are looking at 5,000 years ago or more. ;)
100 years ago we were not using bows and arrows...
In 1907 (100 years ago) we had guns and steamships then.
"The most important decision we make is whether we believe we live in a friendly or hostile universe."
- Albert Einstein
Einstein was speaking to our perceptions of the world we live in. Attitude is everything. Our thoughts are constantly creating our reality. If a person has the attitude that the universe is a benevolent and nurturing environment, then, regardless of whether that is true or not, they will tend to lead a charmed life-- optimism is a self-fulfilling prophesy.
There is a reason that the media/governement/corporations/and the elite who run the world WANT YOU to live in fear....
When you live in fear, you can be controlled by them which know better.