Stephen Elop, from Microsoft, became CEO of Nokia in 2010. Nokia was struggling to adapt before that, in 2008/2009, but Elop formed partnerships with Microsoft, put all bets on Windows Phone, and cancelled work on Android devices and the previous experimental Maemo platform. He decimated a huge company surprisingly quickly.

But is this really Microsoft's fault? Not directly, I guess ... but is it really plausible that Microsoft didn't have any underhanded influence on Nokia's board to put an obvious Microsoft stooge/idiot in charge of destroying the company?