His good friend Mark Twain dubbed him "St. Andrew." British Prime Minister William Gladstone called him an "example" for the wealthy. Such terms seldom apply to multimillionaires. But Andrew Carnegie was no run-of-the-mill steel magnate. At age 13 and full of dreams, he sailed from his native Dunfermline, Scotland, to America. The story of his success begins with a $1.20-a-week job at a bobbin factory. By the end of his life, he had amassed an unprecedented fortune—and given away more than 90 percent of it for the good of mankind.