[Long Cut]

"If there are isolated tribes of humans say in the Andes, what are the chances they will devolve into monkeys? "

Probably zero. You DO understand that;

1. Monkeys and apes are NOT the same;

2. Evolution is a response to environmental and other pressures on a population. since those factors are wildly different in different locales and times, what something COULD evolve into is pretty unpredictable.

[mlc9852]

What is the most recent "surprise" in the evolutionary line of humans?