Researchers, anthropologists and demographers guesstimate that a hundred billion humans have lived on planet earth over the last 200,000 years. Of those hundred billion people, we are part of the 7.5 billion who are in temporary charge. We're passing through, so to speak. We are the meek, the earth is ours. And as with any inheritance, you sift through what needs keeping and what needs binning. There's plenty of good. There are still some...