What did carnegie do to ensure that his money would be used to society

In 1911, Carnegie, the wealthy industrialist, created the Carnegie Corporation and endowed it with the majority of his remaining wealth so the corporation  would continue his philanthropic (donation) activities after his death.

When it was established, the Carnegie Corporation was the largest single philanthropic trust ever created with 135million dollars in assets. Carnegie was the corporation's first president.

By the time he died. Carnegie had already given 350 million dollars away, and the remaining 30 million was given to foundations and charities.

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