How much progress has man made in his search for the truth? Throughout history, humans have struggled to understand the mysteries of life, from the simplest to the seemingly miraculous. In this new book, David Deutsch emphasizes that "interpretations" are very important in the universe, and that seeking to improve them is the fundamental organizing principle not only for science but also for all successful human endeavors. David Deutsch takes us on a journey through all the basic fields of science, as well as the history of civilization, art, moral values, and the theory of political institutions, tracing how to formulate new interpretations and give up the bad.

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David Deutsch also sees that every progress - theoretically or practically - is the result of one human activity: the pursuit of good interpretations. Although it is a pure human endeavor, its influence is also a fundamental fact of reality at the highest universal non-human levels: in the sense that it is in harmony with the general laws of nature which are in fact good interpretations.