This monograph consists of nine chapters which develop the well known Einstein Cartan Evans (ECE and ECE2) unified field theory which has swept the world of science in step with the knowledge revolution. It systematically develops the ECE theory from geometrical first principles and applies it to the unification of gravitation and electrodynamics and the unification of quantum mechanics and general relativity in nine chapters as follows. 1) Basics of Cartan Geometry; 2) Electrodynamics and Gravitation; 3) ECE Theory and Beltrami Fields; 4) Photon Mass and the B(3) field; 5) Unification of Quantum Mechanics and Gravitation; 6) Antisymmetry; 7) Energy from Spacetime and Low Energy Nuclear Reactions; 8) ECE Cosmology ; 9) Relativistic Cosmology and Einstein's Gravitational Waves. The monograph has been translated into Spanish by Alex Hill (Spanish language section of www.aias.us. It has already been read tens of thousands of times off www.aias.us and www.upitec.org. Both sites are archived permanently on www.archive.org and www.webarchive.org.uk About the Authors Myron Evans (Marquis Who's Who over thirty editions online) is a Civil List Pensioner and author of about two thousand publications and broadcasts. He is perhaps best known for the Einstein Cartan Evans (ECE and ECE2) unified field theory, which has been studied open source tens of millions of times. Horst Eckardt (Marquis world edition online) is a well known author and co author of many of the ECE and ECE2 papers on www.aias.us and www.upitec.org. He is primarily interested in sources of new energy and is also a theoretical physicist and chemist. He is a leading scholar of ECE physics. Douglas Lindstrom (Marquis world edition online) is primarily interested in new forms of energy and worked in government facilities in Canada developing new materials. He is a well known author of several of the ECE papers, and is a leading ECE scholar. Stephen Crothers is probably the leading scholar of conventional Einsteinian general relativity and is a well known author and lecturer. He is an internationally renowned and definitive critic of the methods used to solve the conventional Einstein field equation.