The older I get, the more important my view of the family is.

The rate of technological and human physiological change in the 20th century has been remarkable. Beyond that, a synergy between the improved technology and physiology is more than the simple addition of the two.

Centuries ago it may have been difficult for pregnant women and their children to get proper nourishment, probably leading to smaller - and therefore shorter-lived - adults.

In most, if not quite all, parts of the world, the size, shape and longevity of the human body have changed more substantially, and much more rapidly, during the past three centuries than over many previous millennia.

The older I get, the more important my view of the family is.

Among the current discussions, the impact of new and sophisticated methods in the study of the past occupies an important place. The new 'scientific' or 'cliometric' history-born of the marriage contracted between historical problems and advanced statistical analysis, with economic theory as bridesmaid and the computer as best man-has made tremendous advances in the last generation.

The Quest for Prosperity is an important book. Written with verve and clarity, it reflects a deep understanding of global economic issues, and proposes practical solutions that anyone concerned with the plight of the world's poor would be wise to read.