A common mistake some people make in regarding the independent expression of similar advances in culture around the world at similar times is that
what appears to be a geologically similar time frame could have differences of hundreds of years, if not a thousand or two, which is common for
Over the course of a few hundred, to two thousand years, well, people are like sand at the beach, and tend to get everywhere, even the darndest
While getting everywhere, surviving, and sometimes not, well, they spread their ideas and tools along the way with other peoples.
Thus, what may appear to be independent spontaneous combustion of differing cultural advances and innovations could very well be the invisible
influence of people just getting up to travelling about like they always seem to do.
Over the last 2000 years, a blink of the eye in geological time, how far have we, as people spread?
Who's to say that 45,000 years ago, our ancestors weren't just as proficient at getting out and about, meeting other people, and sharing info, tools,
Dating finds that far back is prone to error with some plus or minus in degrees of a few hundred to a couple thousand years depending on the
reliability of your samples and the methods employed for dating.
45,000 years from now, were future archaeologists to employ the same dating methods we use now to date artifacts, our history would look like a really
strange mix of hunter-gatherer subsistence living bundled with iPads, LCD TVs, stone tools, bronze age weapons, steam engines, spacecraft, horse and
buggy transport, nuclear power, telegraph communication, and the whole variety of everything that encompasses the history of the last 2000 years.
It'd be really super confusing.
In light of this confusion, it's easy to see how it can appear that many diverse cultures all over the planet spontaneously developed advances all at
the same time, when in reality, there was likely more a degree of gradualism occurring over a much longer scale of time than most non-academics are
use to thinking.
Ancient history can get along fine and be spoken for in accounting for it's developments quite well on it's own without people from the stars giving
gifts of knowledge to all the good little boys and girls of planet earth.
edit on 1-8-2012 by Druscilla because: (no reason given)