The most important question he may not be prepared to answer is far more philosophical. It has little to do with engineering fixes or the technicalities of Facebook's privacy policies in 2014. It's this: How can Facebook ward off tomorrow's crisis if its guiding principle is and always has been connection at all cost, maximizing the flow of data between people and their friends – as well as advertisers and apps? And if it radically alters that ethos – the one that allowed it to grow to 2.2 billion users and counting – can it sustain itself? "This could be a missed opportunity if it’s focused o...