This is a field I have studied.
Early man was early man, but what about a hundred years before that? And a thousand years before that? 100,000? 1,000,000? 5,000,000?
There are a lot of fossil critters out there that anthropology suggests that are ancestral to "early man." You don't want to call them apes.
What were they? And on what evidence do you base your opinion?
Yes, I am also curious as to where this arbitrary boundary can be drawn.
Oh well, it is difficult for some people to understand the fundamental theory of calculus, namely that a whole lot of discrete points become, to all extents and purposes, a curve. Or that a series can sum to up, to all extents and purposes, a whole number.
These limits to understanding can be overcome, but it takes time (hopefully not on the geologic scale), for some more than others.
The idea of the sacred is quite simply one of the most conservative notions in any culture, because it seeks to turn other ideas - uncertainty, progress, change - into crimes.
Salman Rushdie
This rudderless world is not shaped by vague metaphysical forces. It is not God who kills the children. Not fate that butchers them or destiny that feeds them to the dogs. It’s us. Only us. - the character Rorschach in Watchmen