Now this is cool. What strategies they used to create and maintain their wealth.How their values changed after becoming the world’s richest Interview with Carlos Slim (2007) http://online.wsj.com/article/SB118615255900587380.html Interview with Warren Buffet (2006) http://money.cnn.com/2006/06/25/magazines/fortune/charity2.fortune/index.htm Interview with Bill Gates (1994) http://ei.cs.vt.edu/~history/Bill.Gates.html