[quote=@Fabulous Knight]
[@Kho][i]You're[/i] thinking of the neolithic (or new stone age, which sounds much cooler IMO). [url=https://en.wikipedia.org/wiki/Stone_Age]The stone age lasted three and a half million years.[/url]
[/quote]

Meh, your argument is noted, though I personally see that prehistory ends and the Stone Age begins with the establishments of significant settlements - such as Jericho and Catalhoyuk.

The reason I say this is, is that just because it hasn't come down to us, it is not necessary that these civilisations could not write or did not write.