I believe they have devolved into what we now know as "undocumented workers"
Actually, if you head down to Guatemala, if you are familiar with Mayan and Olmec culture, you will get a surprise. Half the people look like Olmecs, kind of a defeated, humble people, heads looking much like the giant stone heads, with almost negroid noses.
The other half look like Mayans, right off the murals, and they have good, upright posture, long strides in their walk, and look like an undefeated people. Close to Roman noses.
I find it hilarious when people attribute “nature friendliness” to ancient cultures. If those same ancient cultures had invented plastic and had more trash that wasn’t biodegradable we’d be cursing them for littering... because if modern day primitive cultures are any indicator, environmentalism is not part of their way of life.