Mihir Desai, professor at Harvard Business School and Harvard Law School, argues for re-humanizing finance. He says the practice of finance, with increasing quantification, has lost touch with its foundations. But he says finance can be principled, ethical, even life-affirming. And demonizing it or ignoring it means that the rest of us – those not in finance – risk misunderstanding it, which has all kinds of implications for how we make decisions and plan for our futures. Desai is the author of the new book, "The Wisdom of Finance: Discovering Humanity in the World of Risk and Return." He also writes about finance and the economy for hbr.org.