Forecasts of potential environmental catastrophe have a long and cel- ebrated tradition. Form Thomas Malthus's eighteenth century prediction that population would outrun food supply to the elaborate analysis of the future scarcity of economically important natural resources by the Club of Rome, many of these forecasts have in common the happy circumstance That the advertised catastrophe has not (yet) occurred (Anon., 1997). What Implication for current action should we then derive from the failure of so Many of these predictions?
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