ABSTRACT
the development of aviation seems to promise contradictory results. In order to provide a basis for discussion, let us assume that within a few decades aeroplanes will average five hundred miles an hour on long trips, and helicopters, or some other craft that can hover in the air and land on a small space, will become practical for ordinary persons and will have a speed and cruising range similar to that of automobiles. If these assumptions are realized, we may reasonably expect that aviation will produce the following results:
It will promote the creation of one world, but it will lead to increasing contrasts between the parts of that world.
It will help to preserve the health of crops, animals, and man, but it will bring new hazards to all these forms of life.
It will diminish the population in some areas, and increase it in others.
After serving most terribly as an engine of war, it may become an equally powerful engine of peace.
