This chapter reframes technological advantage as a problem of diffusion, not invention. Using the “watchtower” as a method for disciplined perspective, it shows how power moves through a sequence of translations—where ideas must pass intact through institutions, instruments, and infrastructure to become lived impact. The chapter formalizes this pathway as the I5 Chain (Ideas → Institutions → Instruments → Infrastructure → Impact) and argues that the decisive variable is whether the interfaces at each handoff are explicit, auditable, and reversible on a clock. In an era when the tempo from design to consequence has collapsed, legitimacy—more than capability—becomes scarce; governance that cannot match speed with visible correction converts brilliance into volatility. The chapter contrasts telocratic (guidance-first, pilot–feedback–scale) and nomocratic (remedy-first, process-anchored) governance traditions, situating China’s tradition of guided diffusion as a civilizational continuity from Han paper and Song paper money to contemporary digital systems. It sets the stakes for the book: in a world of interlocking technologies (AI, data, payments), the frontier of power is guidance—the capacity to keep joints tight so that meaning travels from Ideas to Impact without leakage. The chapter concludes by mapping the book’s structure and offering a reader compact for auditing interfaces, reversals, timers, and responsibility in real time.