3 ms·
Recap of earlier point: Civilizations south of the NA desert border (Mojave, Sonoran and Chihuahuan) had writing. 400+ civilizations north of it did not.
by onlypassingthru 5mo ago
Recap of earlier point: Civilizations south of the NA desert border (Mojave, Sonoran and Chihuahuan) had writing. 400+ civilizations north of it did not.