In his preface, Pinker states: "The idea that nature and nurture
interact to shape some part of the mind might turn out to be wrong,
but it is not wishy-washy or unexceptionable, even in the twenty-first
century, thousands of years after the issue was framed. When it comes
to explaining human thought and behavior, the possibility that heredity
plays any role at all still has the power to shock. To acknowledge human
nature, many think, is to endorse racism, sexism, war, greed, genocide,
nihilism, reactionary politics, and neglect of children and the disadvantaged.
Any claim that the mind has an innate organization strikes people not
as a hypothesis that might be incorrect but as a thought it is immoral
to think."
Pinker considers the greatest scientific achievement of the twentieth
century is putting together the understanding of life and the understanding
of matter and energy. Molecular biology shows that the nonliving part
of the physical world is a collection of molecular machinery, complex
in the extreme, but machinery all the same.
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