If the Darwinian package were correct, then we would expect to see the simultaneous appearance in the archeological and fossil records of evidence fo… - 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.

I'm known for speaking my mind, a trait I probably inherited from my parents, Louis and Mary Leakey—neither of whom was renowned for tact.