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Harvard Biologist Admits: We Know Nothing About Brain Evolution

Science journals have featured countlessmuch cause for pessimism in the study of
stories about the evolution of the humanhuman origins. Science reporter James
brain. Scientists are puzzled sinceRanderson of Britain's Guardian
humans have much bigger brains than anynewspaper was even more brunt, saying,
other species. Their suggested"We know nothing about brain evolution."
explanations have often been mutuallyRanderson went on to summarise
exclusive. For instance, the old textLewontin's reasons for pessimism. "The
book explanation relied on eating meathandful of hominid fossils stretching
but a few years ago an article in Newback 4m years or so" cannot tell us
Scientist, a popular science magazine,whether any of them were our ancestors.
suggested that eating starch was theWe "do not have the have the faintest
secret of brain growth. But bothidea what the cranial capacity [of a
explanations fail to answer why otherfossil hominid] means". Moreover, we do
meat or starch eating species do notnot even know which hominids walked
have big brains.upright and which did not.
At the recent AAAS (American AssociationLewontin is well-known for his
for the Advancement of Science) annualoutspokenness. In 1997 he wrote in The
meeting in Boston, Richard Lewontin, aNew York Review of Books that scientists
distinguished biology professor atoften choose to make up "unsubstantiated
Harvard University, acknowledged thatjust-so stories" because they "have a
stories about human brain evolution haveprior commitment, a commitment to
not been based on facts. Reporting onmaterialism... Moreover, that
the meeting for the journal Science,materialism is an absolute, for we
Michael Balter quoted Lewontin ascannot allow a Divine Foot in the door."
saying, "We are missing the fossilObviously, the scientific community
record of human cognition, so we make upcannot ignore Lewinton's recent
stories." The title of Balter's articleconclusions. If the ruling paradigm
seems to be an admission of sorts: "How(naturalism or the view that nature is
Human Intelligence Evolved--Is Itall there is) leads us into a blind
Science or 'Paleofantasy'?"alley, might there be something wrong
According to professor Lewontin, it iswith it?
fantasy. Lewontin suggests that there is



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