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Liberals
returned to power during the last
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quarter
of the 19th century. They based their
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policies
on the positivism of Auguste Comte,
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stressing
a scientific approach to social
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problems.
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The
shift was caused by changes in the nature
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of
the Industrial Revolution and the age of
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imperialism.
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Latin
American economies expanded rapidly
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after
1850 and the population doubled.
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