Frases de Richard Leakey

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“A vital leap in the evolution of intellectual capacity would have been the ability to form concepts, to conceive of individual objects as belonging to distinct classes, and thus do away with the almost intolerable burden of relating one experience to another. Concepts, moreover, can be manipulated and this is the root of abstract thought and of invention. The formation of concepts is also a necessary, but apparently not sufficient, condition for the emergence of language.”

“This tendency to anthropomorphize flows naturally from the context in which consciousness evolved. Consciousness is a social tool for understanding the behavior of others by modelling it on one's own feelings.”

“We are justified in calling all species of bipedal ape "human."… the adaptation of bipedalism was so loaded with evolutionary potential—freeing the upper limbs to be free to become manipulative implements one day—that its importance should be recognized in our nomenclature. These humans were not like us, but without the bipedal adaptation they couldn't have become us.”

“When a San Shaman goes into a trance, he harnesses that power, becomes part of the world beyond, becomes invisible to the singers and dancers around him, and draws images on the rock face. Ask the San who drew the images, and they say the spirits. And the rock face is more than a surface for the paint; it is the boundary of this world and the world beyond. …part of the meaning of it all, and the rock shelter itself assumes a special status, a place of veneration.”

“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.”

“The French archeologists Iégor Reznikoff and Michael Dauvois conducted detailed surveys of three decorated caves in the Ariège region of southwest France. …they moved slowly through the caves, stopping repeatedly to test the resonance of each section… spanning three octaves… those areas with highest resonance were also those most likely to harbor a painting or engraving. …a fascinating discovery that… Chris Scarre commented at the time, draws "new attention to the likely importance of music and singing in the rituals of our early ancestors."”

“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.”

“Protecting elephants and conserving natural ecosystems remain my personal priorities. But I am not so sure this would be so were I ill, hungry, and living in dispair. …We must somehow find a way to provide for our own species if we are also to preserve others.”