It appears that the evolutionary process promotes its own progress: learning about the environment (which demands a certain intelligence) means livin… - Richard Leakey

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.

Three revolutions mark the history of life on earth. The first was the origin of life itself... The second... was the origin of multicellular organisms... The origin of human consciousness... was the third... Life became aware of itself, and began to transform the world of nature to its own ends.

The challenge for individuals in primate societies is to be able to predict the behavior of others. One way would be for individuals to have a huge mental bank in their brains, which stored every possible action of their fellow troop members and their own appropriate actions.