This volume presents a comprehensive realist framework encompassing quantum foundations, quantum gravity, and the origin of inertia (Mach's Principle). It develops and builds upon a quantum ontology consisting of two fundamental ontic entities, called W-state and P-state, that respectively account for the wave- and particle-like aspects of quantum systems.W-state is a generalization of the wavefunction, but has ontic stature and is defined on the joint time-frequency domain. It constitutes a non-classical local reality, consisting of superpositions of quantum waves writ small. P-state enforces entanglement obligations and mediates the global coordination within quantum systems required to bring about wavefunction collapse in causal fashion consistent with special relativity.Quantum theory is rebuilt from the ground up, and the development then proceeds to quantum gravity, which is solved surprisingly easily once a good quantum foundations solution is in hand. It is solved not in the Planck regime, but in the testable regime of classical general relativity. The two great theories are intermeshed, and proposed testable solutions for the dark matter conundrum and origin of inertia are set forth. Both depend on non-local gravitational sourcing via P-state. The overall result is a robust architectural foundation for a (still elusive) Theory of Everything.