Heat waves, droughts, and other forms of extreme weather will increase in frequency and severity. Agriculture will become less reliable and suffer declining yields. Rising sea-levels will mean the submersion of many coastal regions. Most discussions of the environmental crisis stop there, however. We then go on to demand an end to fossil-fuel extraction and the redoubling of efforts to convert our economies to renewable forms of energy. The collapsologues go further. The flippancy with which they declare that a future of economic meltdown and societal failure is just around the corner can be quite chilling: “By 2035, the French Republic, the European Union, will not exist.”