Macau, China (AP) -- Billionaire casino developer Steve Wynn criticized former Chinese leader Mao Zedong on Monday, telling more than a thousand investment advisers at a conference that the communist revolutionary's "imbecilic" Cultural Revolution "almost ruined" the country. The chief executive of Wynn Resorts, which operates a casino-resort in the Chinese special administrative region of Macau, spoke during a question-and-answer session at the Charles Schwab IMPACT 2007 conference.