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Harvard Biologist Admits: We Know Nothing About Brain Evolution

Science journals have featured countlesscause for pessimism in the study of human
stories about the evolution of the humanorigins. Science reporter James Randerson of
brain. Scientists are puzzled since humansBritain's Guardian newspaper was even more
have much bigger brains than any otherbrunt, saying, "We know nothing about brain
species. Their suggested explanations haveevolution." Randerson went on to summarise
often been mutually exclusive. For instance,Lewontin's reasons for pessimism. "The
the old text book explanation relied onhandful of hominid fossils stretching back 4m
eating meat but a few years ago an article inyears or so" cannot tell us whether any of
New Scientist, a popular science magazine,them were our ancestors. We "do not have the
suggested that eating starch was the secrethave the faintest idea what the cranial
of brain growth. But both explanations failcapacity [of a fossil hominid] means".
to answer why other meat or starch eatingMoreover, we do not even know which hominids
species  do  not  have  big  brains.walked  upright  and  which  did  not.
At the recent AAAS (American Association forLewontin is well-known for his outspokenness.
the Advancement of Science) annual meeting inIn 1997 he wrote in The New York Review of
Boston, Richard Lewontin, a distinguishedBooks that scientists often choose to make up
biology professor at Harvard University,"unsubstantiated just-so stories" because
acknowledged that stories about human brainthey "have a prior commitment, a commitment
evolution have not been based on facts.to materialism... Moreover, that materialism
Reporting on the meeting for the journalis an absolute, for we cannot allow a Divine
Science, Michael Balter quoted Lewontin asFoot  in  the  door."
saying, "We are missing the fossil record of
human cognition, so we make up stories." TheObviously, the scientific community cannot
title of Balter's article seems to be anignore Lewinton's recent conclusions. If the
admission of sorts: "How Human Intelligenceruling paradigm (naturalism or the view that
Evolved--Is  It  Science  or 'Paleofantasy'?"nature is all there is) leads us into a blind
alley, might there be something wrong with
According to professor Lewontin, it isit?
fantasy. Lewontin suggests that there is much



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