"Around the world, we see the results of exploitation which destroys much without taking future generations into account. Protecting the world's forests; stemming desertification and erosion; avoiding the spread of toxic substances harmful to man, animals and plants; protecting the atmosphere; all these can be accomplished only through active and wise cooperation, without borders or political power plays."

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It may be that the invention of the aeroplane flying-machine will be deemed to have been of less material value to the world than the discovery of Bessemer and open-hearth steel, or the perfection of the telegraph, or the introduction of new and more scientific methods in the management of our great industrial works. To us, however, the conquest of the air, to use a hackneyed phrase, is a technical triumph so dramatic and so amazing that it overshadows in importance every feat that the inventor has accomplished.

— Waldemar Kaempffert