We also live in an era of cheap energy. 'Astonishingly cheap' doesn't even begin to describe how much more we have to work with than our ancestors did. It enabl

We also live in an era of cheap energy. 'Astonishingly cheap' doesn't even begin to describe how much more we have to work with than our ancestors did. It enables modern economies of scale and things like buying imported prosciutto from Italy rather than just buying some preserved ham from the local farmers market.