I am diabetic. If my blood sugar gets too low I feel incredibly agitated and irritated until I get it up again. Until recently, I taught a kid with the same condition. Whereas I suggest it is entirely natural for a child to give vent to the irritation he feels, an adult should exercise a tad more restraint (to put it mildly).

We are human beings, for heaven's sake, not animals at the mercy of our own instincts! It is becoming increasingly fashionable to use environmental or genetic excuses for antisocial or criminal behaviour. I suggest that, every time we do so, we erode a little of what it is to be human. The crown of creation? The paragon of animals? Not the way we are going!

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Stephen