John Barrow revisits one of the hottest topics in all of science, illuminating the modern quest to unlock the secrets of the universe.Published in 1991, John Barrow's Theories of Everything was hailed as "a mind-boggling intellectual adventure" by Publishers Weekly and as "an exhilarating journey...important, engaging, and highly literate" by New Scientist . Now, in New Theories of Everything , Barrow completely updates his classic account of one of the hottest fields in all of science - the search for a cosmic key that will unlock the secrets of the Universe. Will we ever discover a single scientific theory of everything? How can one theory ever explain a world full of chaos and complexity?In this stimulating volume, Barrow sheds light on these questions as he presents the reader with the very latest ideas and predictions, ranging from the speculations of Stephen Wolfram about the world as a computer program to recent developments in string theory and M theory, new varieties of complexity, new ideas about the nature of mathematics, and much more. He reveals that the field has changed dramatically. Fifteen years ago, scientists sought a single theory uniquely specifying the constants and forces of nature, but today they envision a vast landscape of different logically possible laws and constants in many dimensions, of which our own world is but a tiny facet of a higher dimensional reality. Equally important, Barrow reflects on the philosophical and cultural consequences of those remarkable new ideas, highlighting their implications for our own place in the universe.The Theory of Everything has in recent years become the focus of some of the most exciting and imaginative thinking in science. Now fully revised, New Theories of Everything brings the story of this exhilarating quest completely up to date.