For the subject of such a big event, Facebook Home comes off as something less than the revolution in the mobile computing experience that Facebook CEO Mark Zuckerberg promised.

FORBES: Here's Why Facebook Home Won't Revolutionize Mobile Anytime Soon

The biggest fans of the green revolution say that the spread of solar and wind is a mark of success.

BBC: Who pays for the greening of Germany?

Yet the 4m mark has now been reached and neither rioting nor social revolution has broken out.

ECONOMIST: Spanish unemployment: In search of a job | The

Enter Hernando de Soto, a 58-year-old Peruvian economist who made his mark a decade ago with the book The Other Path: The Invisible Revolution in the Third World.

FORBES: Waking Dead Capital

Enter Hernando de Soto, a 58-year-old Peruvian economist who made his mark a decade ago with the book The Other Path: The Invisible Revolution in the Third World (FORBES, Jan. 23, 1989).

FORBES: Waking Dead Capital

Over the last year, the social network revolution has made tycoons out of the likes of Sean Parker, Eduardo Saverin, Mark Pincus and Reid Hoffman.

FORBES: America's Fastest Growing Millionaire Cities