Some of America's leading billionaires have met secretly to consider how their wealth could be used to slow the growth of the world's population and speed up improvements in health and education. The philanthropists who attended a summit convened on the initiative of Bill Gates, the Microsoft co-founder, discussed joining forces to overcome political and religious obstacles to change. Described as the Good Club by one insider it included David Rockefeller Jr, the patriarch of America's wealthiest dynasty, Warren Buffett and George Soros, the financiers, Michael Bloomberg, the mayor of New York, and the media moguls Ted Turner and Oprah...