In the document "Wealth" by Andrew Carnegie, what ways does he say wealth can be used?

Basically, he argues that while business leaders should be
left free to pursue wealth with few restrictions, that wealth should be used to better
the whole community. He thought the rich should ensure that their riches should make
their way back into society, not so much as charity but more as investments in
communities, so that individuals could better themselves, as he thought he had. The most
obvious example of this philosophy put into practice is the endowment of Carnegie
libraries across America. Carnegie had been basically self-educated through access to a
wealthy benefactor's library and wanted to create similar opportunities for others. So
he set up a fund that helped pay for the construction of free public libraries across
the country. He also advocated a rigorous estate tax on inheritances, which would ensure
that money went back into the public, and stayed out of the hands of heirs, who, in his
opinion, hadn't really earned it.