Where Breuil has seen chaos—or at least, randomness—in wall art, Leroi-Gourhan sought and found order. - Richard Leakey

I think both Louis and I were looking for more or less the same thing, and that is, when did our species, Homo, begin?

It appears that the evolutionary process promotes its own progress: learning about the environment (which demands a certain intelligence) means living in a stable social mileau (which demands at least an equal and possibly a greater intelligence); as social intelligence increases, so too will the ability to learn; this in turn encourages an even longer social apprenticeship; and longer group living leads to more social intelligence.

To our western eyes, the painted images are the most prominent component of a corpus of artistic expression. This Western bias, a particularly Eurocentric bias, has been pervasive and deep. ...it has resulted in a lack of attention to, and concern about, prehistoric art of equal and sometimes greater antiquity in eastern and southern Africa.