1: THE UNIFICATION PARADIGM. PREFACE. 1.1 Introduction. 1.2 Inertial Mass. 1.3 Enter General Relativity. 1.4 Further Considerations. 1.5 Prospect. 2: STANDARD MODELS OF PHYSICS AND COSMOLOGY. 2.1 The Strong and Weak Interactions. 2.2 Gauge Fields. 2.3 Standard Cosmology. 3: DIFFERENT APPROACHES: QUANTUM SUPERSTRINGS AND QUANTUM GRAVITY. 3.1 String Theory. 3.2 Loop Quantum Gravity. 4: OTHER APPROACHES. 4.1 Introduction. 4.2 Quantum General Relativity...