I found out that when Carnegie retired at age 66 he was a strong believer in the "Gospel of Wealth". He believed that as a citizen of the United States it was his duty to help out those less fortunate living there. In 1902 Carnegie started his own foundation called the Carnegie Institution that funded scientific research. He gave a $10 million dollar donation to establish a pension fund for teachers. Carnegie also believed in bettering yourself through your education and that there was no better way than to read. Over 2,000 public libraries were built from the money he donated to cities all over. By 1911 Carnegie had given away almost 90% of his money to charities and causes to help his country and it's people.
http://www.americaslibrary.gov/aa/carnegie/aa_carnegie_phil_1.html
