Miller analyzes Einstein's famous paper establishing the theory of relativity in the light of the intellectual struggles of physicists at the start of the 20th century: the interplay between physical theory and empirical data, the inertia of existing theories and interpretations, and the drive to the unification of the sciences. Since its original publication, this book has become a standard reference for the history and philosopy of science; it can equally well serve as a text in the history of ideas or of twentieth-century philosophy.