cond-level thinkers double-think (and triple-think) every angle of every situation. A good example can be seen in the hypothetical newspaper contest John Maynard Keynes wrote about in 1936. Readers would be shown 100 photos and asked to choose the six prettiest girls, with prizes going to the readers who chose the

t holds still. But nothing in the equation says it will. It says that less consumption means either more growth or less output. It doesn’t say which. John Maynard Keynes, probably the most famous and influential economist of the 20" century, put this fact of math a special way in his General Theory of 1936. In his ana

country tuned exactly to the needs of her age. Three times over. Inevitably, the world now asks: Can this continue? 46 Eventually the entire world: John Maynard Keynes, The Economic Consequences of the Peace in The Essential Keynes (Boston: Penguin Classics, 2015) 47 It was possible: Herman Kahn, On Thermonuclear W