There’s a great line in “Margin Call,” a movie covering the hours leading into the 2008 financial crisis, when CEO John Tuld explains, "I'm here to guess what the music might do a week, a month, a year from now. That's it. Nothing more. And standing here tonight, I'mMarkets rise and fall, booms come and go, and the world keeps ticking. Ultimately, I believe observing megatrends, as difficult as they can be to spot, let alone fully comprehend, can yield insights into the advance of human society, which in tu ...