The world is a dangerous place. That's true any time, and at any point in history, but certainly this year the point has been emphasized repeatedly. Although it is often easy to imagine that either it is hubris to think that we live in important times, or alternatively that what is happening right now must be a matter of grave and unprecedented significance, the objective truth is that this year has already seen more uncertainty and tumult than usual. So, naturally, I read a book written to scare people.