[Ben K]

Sixth, genetic drift is a different topic to mutation and subsequent survival.

Seventh, sapient means to act with judgement. Chimps are sapient. Exaggerating our humaness may make the differences seem incredible but we really should drop the ego and ackknowledge we're not that much different. Do we know how much change is required to get our minds? Surely, it's not much given that we often throw up humans with less than chimp-like intelligence....