Resources and man.
As there are fashions in words there are certainly fashions in books and this is another of those dealing with population, resources, production and the environment. However, at this point the simile breaks down; words may only be used, but in a book even the most fashionable subject can be treated in almost an infinite number of ways.
This particular one almost revels in being crisp, factual and fascinating reading matter. It contains a great deal of data" many of which are in easily interpreted text figures, but it hardly ever sacrifices its non-technical status. It remains immensely readable from beginning to end.