This volume collects a series of papers proposing a reinterpretation of string theory based on a “worldsheet-first” ontology. For decades, string theory has been mathematically consistent yet experimentally detached. We argue that the difficulty lies not in the equations themselves, but in their interpretive placement. Rather than treating strings as objects embedded in spacetime, this work proposes the inverse: spacetime emerges from the two-dimensional worldsheet, which serves as the fundamental container of physical reality. Without modifying any established formalism, we show that critical dimensions, conformal invariance, and holographic correspondences naturally follow when the worldsheet is treated as foundational. Extra dimensions are reinterpreted as vibrational degrees of freedom rather than hidden spatial directions. The collected papers trace this inversion from minimal dimensional necessity, through worldsheet dynamics, to a unified interpretive framework aligned with FS–PS (Foundational Structure–Projected Structure) perspectives. The contribution is conceptual rather than predictive: a repositioning of existing mathematics that resolves long-standing puzzles in string theory without introducing new entities or assumptions. This volume is intended for researchers in string theory, quantum gravity, holography, and foundational physics interested in emergent spacetime and interpretation-driven unification.