This article was written with Nicolas Marescaux, Today, our modern life relies largely on numbers. They guide most collective decisions and many individual choices. For Lord Kelvin [1], “If you cannot measure it, you cannot improve it.” In other words, to make a good decision, you must first measure well. But is that enough? IPCC reports have been compiling data and figures for decades, announcing a short-term catastrophe. And yet, nothing happens. “The modern man scorns imagination,” stated Stéphane Mallarmé in 1897. Isn’t it … <a href=“https://freakonomet …