The Elegant Universe: 25th Anniversary Edition

Brian Greene's "The Elegant Universe" has been reissued in a 25th anniversary edition, maintaining the original text while adding a preface and epilogue. The book, which popularized string theory and M-theory upon its initial release in 1999, has sold around 2 million copies and inspired a PBS special. However, the excitement surrounding string theory has waned since the early 1990s due to its inability to deliver a unified theory as initially promised. Critics argue that the field has become tribal, with proponents reluctant to voice dissenting opinions for fear of retribution. The new edition's epilogue addresses string theory's challenges, including the lack of evidence for supersymmetry and the anthropic multiverse concept. Greene acknowledges that string theory currently lacks predictive power but asserts that it remains a vibrant area of research. He claims that recent developments suggest a connection between string theory and quantum field theory, although he gives string theory an incomplete grade for experimental validation. Critics, including Peter Woit, argue that Greene's responses to criticisms are inadequate and misrepresent the concerns raised by detractors. The ongoing debate highlights the tension between the promotion of string theory and the skepticism it faces within the scientific community.

- "The Elegant Universe" celebrates its 25th anniversary with a new edition.

- The book has sold approximately 2 million copies and inspired a PBS special.

- Critics argue that string theory has not fulfilled its promises and has become a tribal field.

- Greene acknowledges string theory's lack of predictive power but defends its research vitality.

- The debate continues over the validity and future of string theory in fundamental physics.