Coherence as the Ground of Everything introduces the central claim of relational structuralism: that coherence is the fundamental condition from which all intelligible structure arises. The paper defines coherence not as harmony, agreement, or symmetry, but as the minimal relational requirement that allows any pattern, process, or manifold to exist at all. From this ground, the paper derives the distinction between T1 (the eternal relational pattern) and T2 (the temporal manifold), showing how development, alignment, collapse, and transformation follow from the interaction between these two structural regimes.The argument reframes metaphysics, theology, and developmental theory around a single primitive: coherence as the enabling condition of reality. This ground explains why temporal processes require duration, why integration cannot be instantaneous, why alignment is orientation rather than obedience, and why the hinge event functions as the structural bridge between eternal pattern and temporal expression. The paper positions coherence as the generative source of pattern, manifold, and meaning, establishing the foundation for the broader field of relational structuralism.