The book begins with a description of the first scientific cosmology developed by the Greeks. Mr. Kuhn thus prepares the way for a continuing analysis of the relation between theory and observation and belief. He describes the many functions--astronomical, scientific, and nonscientific--of the Greek concept of the universe, concentrating especially on the religious implications. He then treats the intellectual, social, and economic developments which nurtured Copernicus' break with traditional astronomy. Although many of these developments, including scholastic criticism of Aristotle's theory of motion and the Renaissance revival of Neoplatonism, lie entirely outside of astronomy, they increased the flexibility of the astronomer's imagination. That new flexibility is apparent in the work of Copernicus, whose DE REVOLUTIONIBUS ORBIUM CAELESTIUM is discussed in detail both for its own significance and as a representative scientific innovation.

With a final analysis of Copernicus' life work--its reception and its contribution to a new scientific concept of the universe--Mr. Kuhn illuminates both the researches that finally made the heliocentric arrangement work, and the achievements in physics and metaphysics that made the planetary earth an integral part of Newtonian science. These are the developments that once again provided man with a coherent and self-consistent conception of the universe and of his own place in it.

This is a book for any reader interested in the evolution of ideas and, in particular, in the curious interplay of hypothesis and experiment which is the essence of modern science. Says James B. Conont in his Foreword: "Professor Kuhn's handling of the subject merits attention, for... he points the way to the road which must be followed if science is to be assimilated into the culture of our times."

In keeping with Kuhn's wishes (he died in 1996), editors James Conant and John Haugeland organized The Road Since Structure to include 11 philosophical essays written since 1970. In the first part of the book, Kuhn spells out his theory as it developed in the 1980s and 1990s; in the second part, he replies to a number of criticisms and misreadings. The third section is a fascinating interview with Kuhn conducted less than a year before he died. For general interest readers, the lengthy interview--in which Kuhn candidly and engagingly discusses the trials and tribulations of his life and philosophical career--will probably be the most interesting part of the book. For those attuned to Kuhn's controversial work, The Road Since Structure is an indispensable aid for understanding his theory as it developed and for appreciating the full force of his replies to a host of critical objections. As always, Kuhn's clarity and fluid prose render accessible a field fraught with opaque writing. --Eric de Place