High Quality Content by WIKIPEDIA articles! The Trouble With Physics is a 2006 book by the theoretical physicist Lee Smolin about the problems with string theory. Subtitled The Rise of String Theory, the Fall of a Science, and What Comes Next, the book strongly criticizes string theory and its prominence in contemporary theoretical physics, on the grounds that string theory has yet to come up with a single prediction that can be verified using any technology that is likely to be feasible within our lifetimes. Smolin also focuses on the difficulties faced by research in quantum gravity, and by current efforts to come up with a theory explaining all four fundamental interactions. More generally, the book is broadly concerned with the role of controversy and diversity of approaches in scientific processes and ethics.