This is the latest (1995) book by the Ehrlichs with the much younger Gretchen Daily as a co-author. There is an enormous difference in tone from Paul Ehrlich's Population Bomb of 1968. In the early book, Ehrlich wrote
The battle to feed all of humanity is over. In the 1970's and 1980's hundreds of millions of people will starve to death in spite of any crash programs embarked upon now.
and continued in his 1974 The End of Affluence.
This vast tragedy, however, is nothing compared to the nutritional disaster that seems likely to overtake humanity in the 1970s (or, at the latest, the 1980s) ... A situation has been created that could lead to a billion or more people starving to death.These strong statements are what made Ehrlich famous.
The present book is much more moderate and puts the Ehrlichs in the middle of the viewers with alarm. There is a lot of interesting and useful information coming from the authors' travels in Africa and Asia.