Classical unified field theories to isospin rather than electromagnetism; this is related to a discrete (or ""internal"") symmetry known to Einstein as "displacement field duality". Einstein became increasingly isolated in his research on a generalized theory of gravitation, and most physicists consider his attempts ultimately unsuccessful. In particular, his pursuit of a unification of the fundamental forces ignored developments in quantum physics (and vice versa), most notably the discovery of the strong nuclear force and weak nuclear force. Inspired by Einstein's approach to a unified field theory and Eddington's idea of the affine connection as the sole basis for differential geometric structure for space-time,
Unified Theory (band) only. "Unified Theory" went on to sell over 16,000 albums by 2002. "California" and "Wither" were both released as singles. However, with the exception of Seattle, most major market radio stations avoided playing "California." Critically, the album received generally positive reviews. Reviewing for Allmusic, Greg Prato stated that "Unified Theory's self-titled debut shows that Shinn has brought a more modern rock sound to the proceedings, mixing Jeff Buckley and Radiohead with Smith and Thorn's retro rock stylings" and that the "12-track debut is a refreshing break from the norm." Lina Lecaro, of the "Los Angeles Times", describes the album as