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Tennyson arranged the belated publication of this early narrative poem solely to counteract the several pirated editions already on the market . How is it possible to make one single line of independent progress out of the antique philosophy , which up to Plato constituted about all the science there was , then out of scholasticism made over by theology with an almost complete absence of science , then out of that philosophy of the 17th century which was a sort of mental exploration running parallel with the new contemporaneous science based on experiment and observation , and finally out of that new criticism which tends to make of philosophy a mere summary of the special knowledge of the individual sciences , which have become so widely differentiated ? Where populations can afford them , for example in periurban areas wher households already pay for biomass fuels , partnerships between governments , nongovernmental organizations and the private sector can improve the reliability of LPG supply and lower the initial cost of buying stove and cylinders . It is a visual event with television documentaries , photo exhibits and displays , as well as an intellectual event for those who organize and participate in seminars , roundtable meetings and symposia . The initial edition was twenty-five copies , of which this is No. 10 . Although they are not inevitably persistent , but evolve over time , they certainly condition the initial direction of economic , social and environmental change , and they may strongly influence even the long-term future . Driving forces set the initial course for development , but the complex regional system can rapidly change direction at critical thresholds of extreme turbulence and instability . They may operate with different magnitudes and directions than those of the initial stage , and they may emerge or disappear as circumstances dictate .