The reality for many of us today, particularly in affluent parts of the western world, is that we have more than we can use, and eat more than we can really digest. Whereas people once worried about death through hunger, a significant proportion of the world today worries about the effects of over-indulgence. Obesity in much of the developed world is a growing statistic, with the burgeoning middle classes of poorer countries, replicating the trend. (And of course, the homeles