Andrew Carnegie can be credited with helping to spread literacy
across America. This man made millions in the late 1800s as the founder
of Carnegie Steel Company. He donated much of his wealth to the
effort of building libraries in communities large and small throughout the
nation. The first Carnegie library was built in Braddock, Pennsylvania,
the home of one of Carnegie Steel Company’s mills. Over the next 30
years, nearly 1800 Carnegie libraries were built throughout the United
States. Towns wanting money from Carnegie to build a library had to
request a grant. Few were refused. Carnegie felt that a library was
one of the best things that a community could give itself because it gave
people the opportunity to improve themselves. Generations of
Americans have benefited from the generosity of Andrew Carnegie.
Which of the following sentences best states the main idea of the
passage?