Radio dissolved the physical venue limits that had bounded mass political attention.

Evidence

Under previous dictatorships, the limits of mass attention had been defined by the size of a physical venue—so that the triumphal parade or mass rally was the outer bound. Using radio and film, however, the ministry saw how such physical limits might be dissolved, making it possible to hold the intimate joint attention of millions. — Tim Wu, The Attention Merchants, 412

Categorization

• XREF: Links to the broader attention-industry arc of this book — broadcast technology scaling individual engagement into mass markets, same dynamic as advertising. — connects to: Existing radio form suppressed its own progressive potential. — Rolf Wiggershaus, The Frankfurt School: Its History,…, 992; Radio’s immediacy enables prolonged centralized nationalist political control — Harold Innis, The Bias of Communication, 1163
• DEFINE: Defines the Nazi attention model’s core mechanism: dissolving the physical-venue constraint on mass attention.
• ADDENDUM: Could support the trees-as-infrastructure piece by analogy — infrastructure that dissolves physical constraints on scale, though the link is loose.

Broader Connections

• Radio’s immediacy enables prolonged centralized nationalist political control #expands (0.85) — Harold Innis, The Bias of Communication, 1163