The fact that approximately one-third of the world's land mass is arid
desert may be congenial for the camel and the cactus, but not for
people. Nevertheless, well over half a billion people, or 15% of the
world's population live in arid desert areas. If the world's population
were distributed evenly over the land surface, we would expect to find
about 30% of the population inhabiting arid desert areas. Does the fact
that 'only' 15% of the world's population live in an arid desert
environment reflect the harshness of the environment? Or is it a
testimony to the adaptability and ingenuity of mankind? Do we view the
glass as half-full? Or half-empty? The contributors to Desert
Development: Man and Technology in Sparselands adopt the position that
the cup is half-full and, in fact, could be filled much more. Indeed,
many arid desert zones do thrive with life, and given appropriate
technological develop- ment, such areas could support even greater
popUlations. While the dire Malthusian prediction that rapid world
population growth exceeds the carrying capacity of existent resource
systems has gained popularity (typified by the 1972 Club of Rome book,
Limits to Growth), there is a growing body of serious work which rejects
such pessimistic 'depletion' models, in favor of models which are mildly
optimistic.