Small changes in knowledge stack upon each other and have effects on logarithmic or polynomial orders of magnitude rather than on a linear scale. Underachievers or not, we are still seeing the same level of knowledge increase (logarithmic/polynomial) due to increased efficiency in communication.<quoted text> If it took them all that time to invent writing then what can we say about homo sapiens. OK let us assume it took them say 50 Thousand years to paint pictures and another say 45 thou to come to writing things down. I think we can safely assume homo sapiens were underachievers at best. If they had the ability to paint such graphic pictures along with the use of paint which would last 30 thousand years then why could they not write anything down? Nothing worth writing down for 95 thousand years? Not an earthquake or volcanic eruption to report to later generations? It is just as easy to speculate they were not around as long as the moderns would have us believe. Keep in mind there is zero ancient precedent for any of modern assumptions.
In laymans terms, our ways of communicating started out slow, but once it took off, it REALLY took off.