Talks from the Hoover Institution Total Defense: The New Deal and the Invention of National Security
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Mar 18, 2026 
Andrew Preston, historian of diplomacy who traces national security to the New Deal; Anthony Gregory, Hoover fellow and commentator who situates and critiques Preston’s claims. They discuss how FDR reframed defense beyond borders, the New Deal’s role in creating security institutions, shifting threat perceptions, and the 1937–47 transformation that led to a permanent wartime state.
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FDR Invented Modern National Security
- National security as a distinct American doctrine was invented in the late 1930s by FDR rather than being timelessly rooted in territorial defense.
- Preston links expansive Cold War-era threat perception back to FDR's rhetoric that survival depended on distant events like South Vietnam decades later.
The Era of American Free Security
- Preston identifies a long era of 'free security' from ~1815 to the 1940s when the U.S. assumed protection by oceans and kept a very small permanent military.
- That model relied on an 'expansible army' that swelled in wartime and demobilized after, producing low peacetime military spending.
Reframe Risk To Build Political Support For Policy
- When selling a new national doctrine, shift public perception of risk by reframing nonurgent problems as existential to create political space for institutional change.
- FDR used this tactic against a broadly internationalist-but-antiwar public like Herbert Hoover's constituency.
