as recently as 3,000 years ago, at the end of the Bronze Age

Oops, guys, I’m full-blooded Navajo and apparently I should have a bicameral mind since my ancestors crossed the Bering Strait land bridge 20,000 years ago into the Americas, becoming a generically isolated population around around 12,000 years ago. Unfortunately, I am an atheist, have a bachelor’s degree in chemical engineering from Stanford University, and do not hear voices of deities instructing me what to do. Sorry for the inconvenience.