I’m starting to hear about people (teens and twenty-somethings primarily) that are getting seriously anxious and even clinically depressed about the state of the world, notably the environment.  People such as David Attenborough suggesting that humans are a plague or than we will be extinct by mid-century aren’t helping helping either. Note the language being used on this image. Shades of Malthus in the late 1700s and the Club of Rome in the 1970s? Where is the optimism?