[Stavka2]

By the way: the Olmecs, Toltecs and Mayas were extinct as civilizations when the W. Europeans arrived. As for liberaries..that's funny, the Indians didn't have a writen language...they used heiroglyphs.

[Arius Piso]

I'm aware of those peoples' history, of course. You don't seem to know that they left behind large libraries of heiroglyphics that the conquistadores burned. Only a few cotex remain, scattared around museums.
And they weren't extinct, their empires just toppled over. Unsustainable agriculture played a role, too. People still speak the languages.