Without fire and tools, those with weaker jaws could not survive. Fire and tools allowed more to survive, and strong jaws no longer needed to be selected for.
Nope, there’s “selection pressure”, it’s right in the Darwinian literature as if nothing is wrong, and it is Lamarckism.
Without fire and tools, those with weaker jaws could not survive. Fire and tools allowed more to survive, and strong jaws no longer needed to be selected for.
Selected for?
For what?
Their future survival?
All random of course.