Two letters to the Guardian, one from Berlin and one from Utah, arrive independently at the same structural diagnosis of AfD success: mainstream parties abandoned the representational ground floor, and populists moved in. Jürgen Schwarz's Berlin letter makes the sharpest institutional argument. The 1990 reunification transplanted western party structures wholesale into the east rather than cultivating indigenous centrist parties. He names Bavaria's Christian Social Union as the model — a regional party that channels local identity into federal stability — and argues an equivalent 'Ost-Union' was never attempted. Die Linke filled the gap temporarily from the left; the AfD now fills it from the right. The mechanism is substitution, not ideology. Schwarz identifies a specific structural barrier: the federal 5% threshold that makes it nearly impossible for a new state-level party to reach the Bundestag. He points to Thüringen.Gerecht, a new local party formed by former BSW members (themselves a split from Die Linke), as a potential centrist vehicle — but concedes that without federal representation, the path is brutally long. The institutional architecture actively suppresses the very remedy the situation demands. Mickey Wright's letter from Utah widens the aperture. The same representational gap produces cynicism in Europe and 'deeper hopelessness' in the US. Wright names the shared underlying pressures with unusual precision: deindustrialisation, rapid technological change, climate-driven disruption, and migration flows from states experiencing poverty and fragility. These are material conditions, not culture-war abstractions. When leaders engage with narratives rather than individuals, the gap becomes fuel for movements 'whose primary interest is power, not solutions.' The two letters together outline a feedback loop that GRIN analysis illuminates clearly. The absence of generative political infrastructure — parties that build local capacity and channel grievance into governance — creates a vacuum. That vacuum is filled by extractive movements that harvest alienation without solving the problems that produce it. The AfD does not need to deliver policy results; it only needs to remain the sole party that acknowledges the lived experience gap. Schwarz's point about the 5% threshold deserves particular attention. Electoral rules designed to prevent Weimar-style fragmentation now function as incumbent protection, blocking exactly the kind of regional party innovation that could defuse populist energy. The system's own resilience mechanism has become a source of fragility — a classic GRIN inversion where rules built for stability produce the instability they were designed to prevent. The twenty-year trajectory is visible in both letters. If mainstream parties continue to treat eastern alienation as a messaging problem rather than a structural one, and if electoral thresholds continue to block regional alternatives, the AfD's institutional entrenchment deepens with each cycle. Wright's US parallel suggests this is not a German exception but a democratic pattern: the gap between political rhetoric and material reality widens until it becomes the defining feature of political life.