What did Carnegie do to fullfill his duty as a wealthy man?

Andrew Carnegie fulfilled his duty as a wealthy man by becoming a prominent philanthropist, believing in the responsibility of the affluent to give back to society. He established numerous libraries, educational institutions, and cultural organizations, most notably the Carnegie Corporation of New York. His philosophy, articulated in his essay "The Gospel of Wealth," emphasized using wealth to promote the welfare of others and improve society. Through his charitable efforts, Carnegie aimed to foster opportunities for education and self-improvement for all.